401K Calculator
Project a defined-contribution retirement account using contributions, match and return assumptions.
Region sensitive | Static formula
Open calculatorDiscovery
All calculators A-Z
Browse CalcMentor calculators by title, category, data type and regional sensitivity.
Absolute Difference Calculator
Calculate the absolute difference between two numbers.
Global | Static_formula
Open calculatorAd ROAS Calculator
Calculate ad roas from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorAge Calculator
Calculate age in years, months and days plus next birthday details.
Global | Static_formula
Open calculatorAmortization Calculator
Estimate first-month interest and principal split for an amortized loan.
Region sensitive | Static formula
Open calculatorAnnuity Calculator
Estimate future value of regular annuity payments.
Region sensitive | Static formula
Open calculatorAnnuity Payout Calculator
Estimate monthly payout from a starting annuity balance.
Region sensitive | Static formula
Open calculatorAnorexic BMI Calculator
Calculate BMI and distance below a selected BMI threshold.
Region sensitive | Static formula
Open calculatorAPI and Token Cost Calculator
Estimate api and token cost from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | External data user entered mode
Open calculatorAppliance Energy Cost Calculator
Estimate appliance energy cost from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorAPR Calculator
Estimate APR from principal, total finance charges and term.
Region sensitive | Static formula
Open calculatorArmy Body Fat Calculator
Estimate body-fat percentage with circumference-style inputs.
Region sensitive | Static formula
Open calculatorARR Calculator
Calculate arr from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorArrival Time Calculator
Estimate arrival hour from start hour and duration hours.
Global | Static formula
Open calculatorAspect Ratio Calculator
Calculate aspect ratio from width and height.
Global | Static formula
Open calculatorAuto Lease Calculator
Estimate a vehicle lease payment from depreciation, money factor and fees.
Region sensitive | Static formula
Open calculatorAuto Loan Calculator
Estimate a fixed-rate vehicle loan payment from price, down payment, rate and term.
Region sensitive | Static formula
Open calculatorAverage Calculator
Calculate average from sum and count.
Global | Static formula
Open calculatorAverage Return Calculator
Calculate compound annual growth rate from start and end value.
Region sensitive | Static formula
Open calculatorAverage Speed Calculator
Calculate average speed from distance and time.
Global | Static_formula
Open calculatorBAC Calculator
Estimate blood alcohol concentration with a Widmark-style formula.
Region sensitive | Static formula
Open calculatorBaker's Percentage Calculator
Calculate baker's percentage from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorBandwidth Calculator
Calculate transfer time from file size and bandwidth.
Global | Static formula
Open calculatorBarista FIRE Calculator
Estimate barista fire from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorBase64 Encode / Decode
Encode text to Base64 in the browser.
Global | Static formula
Open calculatorBasic Calculator
Perform basic arithmetic on two numbers.
Global | Static formula
Open calculatorBig Number Calculator
Estimate powers for large-number planning.
Global | Static formula
Open calculatorBinary Calculator
Convert a decimal integer to binary.
Global | Static formula
Open calculatorBitrate Calculator
Calculate bitrate from file size and duration.
Global | Static formula
Open calculatorBMI Calculator
Estimate body mass index with metric and imperial units, category interpretation and clear limitations.
Global | Static_formula
Open calculatorBMR Calculator
Estimate basal metabolic rate using Mifflin-St Jeor with sex coded as 1 male or 0 female.
Region sensitive | Static formula
Open calculatorBoard Feet Calculator
Calculate board feet from thickness, width, length and quantity.
Global | Static_formula
Open calculatorBoat Loan Calculator
Estimate boat loan monthly payment.
Region sensitive | Static formula
Open calculatorBody Fat Calculator
Estimate body fat percentage with a waist-to-height screening formula.
Region sensitive | Static formula
Open calculatorBody Surface Area Calculator
Estimate body surface area using the Mosteller formula.
Region sensitive | Static formula
Open calculatorBody Type Calculator
Classify waist-to-height ratio as a simple body-shape indicator.
Region sensitive | Static formula
Open calculatorBond Calculator
Estimate annual coupon income from face value and coupon rate.
Region sensitive | Static formula
Open calculatorBra Size Calculator
Estimate band-cup difference from bust and underbust measurements.
Global | Static formula
Open calculatorBreak-Even Calculator
Estimate break-even units from fixed cost, unit price and variable cost.
Global | Static_formula
Open calculatorBreak-Even Price Calculator
Calculate break-even price from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorBrick Calculator
Estimate brick count from wall area and brick face area.
Global | Static formula
Open calculatorBTU Calculator
Estimate BTU per hour from watts.
Global | Static formula
Open calculatorBudget Calculator
Calculate monthly budget surplus or shortfall.
Region sensitive | Static formula
Open calculatorBurn Rate Calculator
Calculate burn rate from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorBusiness Days & Public Holidays Calculator
Calculate business days between two dates by country, excluding weekends and Nager.Date public holidays with optional regional filtering.
Country specific | Live_api_dependent_data
Open calculatorBusiness Loan Calculator
Estimate fixed-rate business loan payment.
Global | Static formula
Open calculatorCake Pan Converter
Calculate cake pan converter from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorCalorie Calculator
Estimate daily calorie needs using researched BMR/TDEE methods and activity assumptions.
Region sensitive | Static_formula
Open calculatorCalories Burned Calculator
Estimate calories burned from MET, body weight and duration.
Region sensitive | Static formula
Open calculatorCanadian Mortgage Calculator
Estimate mortgage payment with a user-entered amortization period.
Region sensitive | Static formula
Open calculatorCap Rate Calculator
Calculate cap rate from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorCarbohydrate Calculator
Calculate carbohydrate grams from calories and carbohydrate percentage.
Region sensitive | Static formula
Open calculatorCarbon Footprint Calculator
Calculate carbon footprint from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorCarpet Area Calculator
Estimate carpet area from room length and width plus waste percent.
Global | Static formula
Open calculatorCash Back or Low Interest Calculator
Compare a cash-back offer with a lower interest financing offer.
Region sensitive | Static formula
Open calculatorCash-on-Cash Return Calculator
Calculate cash-on-cash return from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorCD Calculator
Estimate certificate-of-deposit maturity value with compound interest.
Region sensitive | Static formula
Open calculatorChurn Rate Calculator
Calculate churn rate from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorCircle Area Calculator
Calculate circle area from radius.
Global | Static_formula
Open calculatorCircle Calculator
Calculate circle area and circumference from radius.
Global | Static formula
Open calculatorCircle Circumference Calculator
Calculate circumference from radius.
Global | Static_formula
Open calculatorCloud Storage Cost Calculator
Estimate cloud storage cost from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | External data user entered mode
Open calculatorCoast FIRE Calculator
Estimate coast fire from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorCoffee Ratio Calculator
Calculate coffee ratio from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorCollege Cost Calculator
Project future education cost from current annual cost and inflation assumption.
Region sensitive | Static formula
Open calculatorCommission Calculator
Calculate commission amount from sales and commission rate.
Global | Static_formula
Open calculatorCommon Factor Calculator
Calculate common factor count for two integers.
Global | Static formula
Open calculatorCompound Interest Calculator
Project future value from starting amount, contributions, rate, time and compounding frequency.
Global | Static_formula
Open calculatorConception Calculator
Estimate conception day number from last menstrual period day and ovulation offset.
Region sensitive | Static formula
Open calculatorConcrete Calculator
Calculate concrete volume from length, width and depth.
Global | Static formula
Open calculatorConcrete Volume Calculator
Estimate concrete volume from length, width and depth.
Global | Static_formula
Open calculatorCone Volume Calculator
Calculate cone volume from radius and height.
Global | Static_formula
Open calculatorConfidence Interval Calculator
Calculate a normal-approximation confidence interval.
Global | Static formula
Open calculatorContractor vs Employee Calculator
Calculate contractor vs employee from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorContribution Margin Calculator
Calculate contribution margin from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorConversion Calculator
Convert a value using a user-entered conversion factor.
Global | Static formula
Open calculatorConversion Rate Calculator
Calculate conversion rate from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorCooking Time Adjustment Calculator
Scale cooking time by a percentage adjustment.
Global | Static formula
Open calculatorCost of Living Calculator
Estimate cost of living from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorCPC Calculator
Calculate cpc from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorCPM Calculator
Calculate cpm from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorCredit Card Balance Transfer Calculator
Calculate credit card balance transfer from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorCredit Card Calculator
Estimate monthly interest on a credit card balance.
Region sensitive | Static formula
Open calculatorCredit Card Payoff Calculator
Estimate months to pay off a credit card balance with a fixed monthly payment.
Region sensitive | Static formula
Open calculatorCrowdfunding Goal Calculator
Calculate crowdfunding goal from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorCTR Calculator
Calculate ctr from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorCube Surface Area Calculator
Calculate cube surface area from side length.
Global | Static_formula
Open calculatorCube Volume Calculator
Calculate cube volume from side length.
Global | Static_formula
Open calculatorCurrency Converter
Convert currencies with latest reference rates, historical-date rates, inverse rates, fee/spread estimates and manual fallback mode.
Global | Live_api_dependent
Open calculatorCustomer Acquisition Cost Calculator
Estimate customer acquisition cost from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorCustomer Lifetime Value Calculator
Calculate customer lifetime value from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorCylinder Surface Area Calculator
Calculate closed cylinder surface area from radius and height.
Global | Static_formula
Open calculatorCylinder Volume Calculator
Calculate cylinder volume from radius and height.
Global | Static_formula
Open calculatorData Transfer Rate Calculator
Calculate transfer rate from data size and time.
Global | Static formula
Open calculatorDate Calculator
Add or subtract dates and calculate differences in calendar days with clear date handling.
Global | Static_formula
Open calculatorDay Counter
Count days from weeks and extra days.
Global | Static formula
Open calculatorDay of the Week Calculator
Calculate day-of-week index with Zeller-style numeric inputs.
Global | Static formula
Open calculatorDays to Hours Calculator
Convert days to hours.
Global | Static formula
Open calculatorDeadline Holiday Calculator
Calculate a due date after a number of business days while skipping weekends and Nager.Date public holidays.
Country specific | Live_api_dependent_data
Open calculatorDebt Avalanche vs Snowball Calculator
Calculate debt avalanche vs snowball from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorDebt Consolidation Calculator
Compare current monthly debt payments with a consolidation loan payment.
Region sensitive | Static formula
Open calculatorDebt Payoff Calculator
Estimate payoff time for a debt with fixed monthly payments.
Region sensitive | Static formula
Open calculatorDebt-to-Income Ratio Calculator
Calculate monthly debt-to-income ratio.
Region sensitive | Static formula
Open calculatorDecimal to Percent Calculator
Convert a decimal to a percentage.
Global | Static_formula
Open calculatorDeck Cost Calculator
Estimate deck cost from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorDecking Board Calculator
Estimate decking boards from deck width and board width.
Global | Static formula
Open calculatorDensity Calculator
Calculate density from mass and volume.
Global | Static_formula
Open calculatorDepreciation Calculator
Calculate straight-line depreciation per year.
Region sensitive | Static formula
Open calculatorDew Point Calculator
Estimate dew point from temperature C and relative humidity.
Global | Static formula
Open calculatorDice Roller
Roll a selected number of dice with a selected number of sides.
Global | Static formula
Open calculatorDiscount Calculator
Calculate sale price and savings from original price and discount percent.
Global | Static_formula
Open calculatorDistance Calculator
Calculate distance from speed and time.
Global | Static_formula
Open calculatorDividend Reinvestment Calculator
Calculate dividend reinvestment from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorDividend Yield Calculator
Calculate dividend yield from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorDog Chocolate Toxicity Calculator
Estimate dog chocolate toxicity from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorDog Food Calculator
Calculate dog food from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorDown Payment Calculator
Calculate down payment amount and loan amount from home price and percentage.
Region sensitive | Static formula
Open calculatorDownload Time Calculator
Estimate download time from file size and connection speed.
Global | Static formula
Open calculatorDrywall Sheet Calculator
Estimate drywall sheets from wall area and sheet area.
Global | Static formula
Open calculatorEcommerce Profit Calculator
Calculate ecommerce profit from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorElectrical Power Calculator
Calculate electrical power from voltage and current.
Global | Static_formula
Open calculatorElectricity Calculator
Calculate electricity cost from power, time and price.
Global | Static formula
Open calculatorEllipse Area Calculator
Calculate ellipse area from semi-major and semi-minor axes.
Global | Static_formula
Open calculatorEmergency Fund Calculator
Calculate emergency fund from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorEngine Displacement Calculator
Estimate engine displacement from bore, stroke and cylinder count.
Global | Static formula
Open calculatorEngine Horsepower Calculator
Estimate horsepower from torque and RPM.
Global | Static formula
Open calculatorEquivalent Salary Calculator
Calculate equivalent salary from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorEstate Tax Calculator
Estimate estate tax from taxable estate and user-entered tax rate.
Region sensitive | Static formula
Open calculatorETF Return Calculator
Calculate etf return from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | External data user entered mode
Open calculatorEV Charging Cost Calculator
Estimate EV charging cost from battery energy and electricity price.
Global | Static formula
Open calculatorEV Charging Time Calculator
Calculate ev charging time from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorEV Cost per Distance Calculator
Estimate EV cost per 100 km or miles from consumption and electricity price.
Global | Static formula
Open calculatorEvent Capacity Calculator
Estimate capacity from area and area per person.
Global | Static formula
Open calculatorEvent Cost Per Person Calculator
Estimate event cost per person from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorExpense Ratio Cost Calculator
Estimate expense ratio cost from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorExponent Calculator
Calculate a base raised to an exponent.
Global | Static_formula
Open calculatorFactor Calculator
Count factors of a positive integer.
Global | Static formula
Open calculatorFat Intake Calculator
Calculate fat grams from calories and fat percentage.
Region sensitive | Static formula
Open calculatorFence Cost Calculator
Estimate fence cost from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorFence Panel Calculator
Estimate fence panels from perimeter and panel width.
Global | Static_formula
Open calculatorFHA Loan Calculator
Estimate mortgage payment with user-entered mortgage insurance amount.
Region sensitive | Static formula
Open calculatorFile Size Calculator
Estimate file size from bitrate and duration.
Global | Static formula
Open calculatorFinal Grade Calculator
Estimate the score needed on a final exam to reach a target course grade.
Global | Static formula
Open calculatorFinance Calculator
Calculate future value from present value, rate and years.
Region sensitive | Static formula
Open calculatorFIRE Number Calculator
Estimate fire number from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorFlight Emissions Calculator
Estimate flight emissions from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorFlooring Calculator
Estimate flooring boxes from area, box coverage and waste percent.
Global | Static_formula
Open calculatorFlooring Cost Calculator
Estimate flooring cost from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorForce Calculator
Calculate force from mass and acceleration.
Global | Static_formula
Open calculatorFraction Calculator
Add two fractions and return a decimal result.
Global | Static formula
Open calculatorFraction to Percent Calculator
Convert a fraction to a percentage.
Global | Static_formula
Open calculatorFreelance Hourly Rate Calculator
Calculate freelance hourly rate from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorFrequency Calculator
Calculate frequency from period.
Global | Static_formula
Open calculatorFuel Cost Calculator
Estimate trip fuel cost from distance, efficiency and fuel price with metric/imperial support.
Region sensitive | Static_formula
Open calculatorFuel Efficiency Converter
Convert L/100km to approximate mpg using US gallons.
Global | Static formula
Open calculatorFuture Value Calculator
Calculate future value of a present amount.
Region sensitive | Static formula
Open calculatorGas Mileage Calculator
Calculate fuel economy from distance and fuel used.
Global | Static formula
Open calculatorGDP Calculator
Calculate GDP using the expenditure approach.
Global | Static formula
Open calculatorGFR Calculator
Estimate kidney filtration using a simplified creatinine relationship.
Region sensitive | Static formula
Open calculatorGolf Handicap Calculator
Estimate a golf differential from score, course rating and slope rating.
Global | Static formula
Open calculatorGPA Calculator
Calculate GPA from grades and credits with grading-scale caveats.
Region sensitive | Static_formula
Open calculatorGrade Percentage Calculator
Calculate a test or assignment percentage from points earned and points possible.
Global | Static formula
Open calculatorGrade Points Calculator
Calculate quality points from grade points and credits.
Global | Static formula
Open calculatorGravel Volume Calculator
Estimate gravel volume from length, width and depth.
Global | Static_formula
Open calculatorGreatest Common Factor Calculator
Calculate greatest common factor of two integers.
Global | Static formula
Open calculatorGross Rent Multiplier Calculator
Calculate gross rent multiplier from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorHalf-Life Calculator
Calculate remaining quantity after elapsed half-lives.
Global | Static formula
Open calculatorHealthy Weight Calculator
Calculate the weight range for a BMI range at a given height.
Region sensitive | Static formula
Open calculatorHeat Index Calculator
Calculate heat index from temperature F and relative humidity.
Global | Static formula
Open calculatorHeat Pump Savings Calculator
Estimate heat pump savings from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorHeight Calculator
Convert height from centimeters to feet and inches.
Region sensitive | Static formula
Open calculatorHELOC Calculator
Estimate interest-only HELOC payment from balance and APR.
Region sensitive | Static formula
Open calculatorHex Calculator
Convert a decimal integer to hexadecimal.
Global | Static formula
Open calculatorHoliday Difference Between Countries Calculator
Compare public holidays between two countries in the same year, including country-only dates and same-date overlaps.
Country specific | Live_api_dependent_data
Open calculatorHome Equity Loan Calculator
Estimate a fixed home equity loan payment.
Region sensitive | Static formula
Open calculatorHome Renovation Budget Calculator
Estimate home renovation budget from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorHorsepower Calculator
Calculate mechanical horsepower from watts.
Global | Static formula
Open calculatorHotel Cost Calculator
Calculate total hotel cost from nightly rate, nights and rooms.
Global | Static formula
Open calculatorHours Calculator
Convert days and hours into total hours.
Global | Static formula
Open calculatorHours to Minutes Calculator
Convert hours to minutes.
Global | Static formula
Open calculatorHouse Affordability Calculator
Estimate an affordable home price from monthly budget, down payment, rate and term.
Region sensitive | Static formula
Open calculatorHousehold Income Percentile Calculator
Calculate household income percentile from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorIdeal Weight Calculator
Estimate ideal body weight using the Devine formula.
Region sensitive | Static formula
Open calculatorIncome Percentile by Age Calculator
Calculate income percentile by age from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorIncome Percentile Calculator
Calculate income percentile from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorIncome Tax Calculator
Estimate income tax from taxable income and a user-entered effective tax rate.
Region sensitive | Static formula
Open calculatorInflation Calculator
Compare purchasing power across years using documented CPI data sources and freshness labels.
Country specific | Periodically_updated_data
Open calculatorInsulation Calculator
Calculate insulation from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorInterest Calculator
Calculate simple interest from principal, annual rate and time.
Region sensitive | Static formula
Open calculatorInterest Rate Calculator
Estimate the annual rate needed to grow an amount to a target over time.
Region sensitive | Static formula
Open calculatorInvestment Calculator
Project future investment value from starting amount, contributions, rate and time.
Region sensitive | Static formula
Open calculatorInvoice Late Fee Calculator
Calculate invoice late fee from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorIP Subnet Calculator
Calculate address count from IPv4 CIDR prefix length.
Global | Static formula
Open calculatorIRA Calculator
Project an individual retirement account from balance, contribution and return assumptions.
Region sensitive | Static formula
Open calculatorIRR Calculator
Approximate annual return from initial investment, final value and annual cash flow.
Region sensitive | Static formula
Open calculatorKinetic Energy Calculator
Calculate kinetic energy from mass and velocity.
Global | Static_formula
Open calculatorLaptop Battery Life Calculator
Calculate laptop battery life from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorLean Body Mass Calculator
Estimate lean body mass from weight and body-fat percentage.
Region sensitive | Static formula
Open calculatorLease Calculator
Estimate lease payment from cost, residual, money factor and term.
Region sensitive | Static formula
Open calculatorLeast Common Multiple Calculator
Calculate least common multiple of two integers.
Global | Static formula
Open calculatorLifestyle Inflation Calculator
Calculate lifestyle inflation from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorLoan Calculator
Estimate amortized loan payments, total interest and total cost with a payment schedule.
Region sensitive | Static_formula
Open calculatorLoan-to-Value Calculator
Calculate loan-to-value from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorLogarithm Calculator
Calculate logarithm with a chosen base.
Global | Static_formula
Open calculatorLong Division Calculator
Calculate quotient and remainder for integer division.
Global | Static formula
Open calculatorLong Weekend Finder
Find long weekends and bridge-day opportunities for a selected country and year using the Nager.Date LongWeekend endpoint.
Country specific | Live_api_dependent_data
Open calculatorLove Calculator
Generate a playful deterministic score from two name lengths.
Global | Static formula
Open calculatorLTV:CAC Ratio Calculator
Calculate ltv:cac ratio from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorMacro Calculator
Split daily calories into carbohydrate, protein and fat grams.
Region sensitive | Static formula
Open calculatorMargin Calculator
Calculate gross margin percentage from revenue and cost.
Global | Static_formula
Open calculatorMarkup Calculator
Calculate selling price from cost and markup percent.
Global | Static_formula
Open calculatorMarriage Tax Calculator
Estimate combined tax difference from two individual taxes and a joint tax estimate.
Region sensitive | Static formula
Open calculatorMass Calculator from Density
Calculate mass from density and volume.
Global | Static_formula
Open calculatorMatrix Calculator
Calculate determinant of a 2 by 2 matrix.
Global | Static formula
Open calculatorMean Calculator
Calculate arithmetic mean from a list of numbers.
Global | Static_formula
Open calculatorMedian Calculator
Calculate the median from a list of numbers.
Global | Static_formula
Open calculatorMegapixel Calculator
Convert image width and height in pixels to megapixels.
Global | Static formula
Open calculatorMileage Calculator
Calculate trip mileage cost from distance and cost per distance unit.
Global | Static formula
Open calculatorMinutes to Seconds Calculator
Convert minutes to seconds.
Global | Static formula
Open calculatorMode Calculator
Find the most frequent value in a list.
Global | Static_formula
Open calculatorMolarity Calculator
Calculate molarity from moles and liters.
Global | Static formula
Open calculatorMolecular Weight Calculator
Calculate molecular weight from mass and moles.
Global | Static formula
Open calculatorMortgage Amortization Calculator
Estimate mortgage payment and first-month amortization split.
Region sensitive | Static formula
Open calculatorMortgage Calculator
Estimate mortgage payments with optional taxes, insurance and clear country/region caveats.
Region sensitive | Static_formula
Open calculatorMortgage Calculator UK
Estimate a UK-style mortgage payment using user-entered price, deposit, rate and term.
Region sensitive | Static formula
Open calculatorMortgage Payoff Calculator
Estimate months needed to pay off a mortgage with extra monthly payments.
Region sensitive | Static formula
Open calculatorMortgage Points Calculator
Calculate mortgage points from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorMoving Box Calculator
Estimate boxes from total volume and box volume.
Global | Static formula
Open calculatorMoving Cost Calculator
Estimate moving cost from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorMPG to L/100km Calculator
Convert US mpg to liters per 100 km.
Global | Static formula
Open calculatorMRR Calculator
Calculate mrr from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorMulch Volume Calculator
Estimate mulch volume from area and depth.
Global | Static_formula
Open calculatorMutual Fund Calculator
Project mutual fund value after expense ratio and assumed return.
Region sensitive | Static formula
Open calculatorNet Effective Rent Calculator
Calculate net effective rent from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorNet Operating Income Calculator
Calculate net operating income from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorNet Worth by Age Calculator
Calculate net worth by age from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorNet Worth Calculator
Calculate net worth from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorNet Worth Percentile Calculator
Calculate net worth percentile from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorNext Public Holiday Calculator
Find the next public holiday for a selected country using Nager.Date, with days until, weekday and upcoming holidays.
Country specific | Live_api_dependent_data
Open calculatorNumber Sequence Calculator
Find the nth term of an arithmetic sequence.
Global | Static formula
Open calculatorOccupancy Rate Calculator
Calculate occupancy rate from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorOhms Law Calculator
Calculate voltage from current and resistance.
Global | Static formula
Open calculatorOhms Law Current Calculator
Calculate current from voltage and resistance.
Global | Static_formula
Open calculatorOhms Law Voltage Calculator
Calculate voltage from current and resistance.
Global | Static_formula
Open calculatorOne Rep Max Calculator
Estimate one-repetition maximum with the Epley formula.
Region sensitive | Static formula
Open calculatorOverweight Calculator
Calculate BMI and the amount above a selected BMI threshold.
Region sensitive | Static formula
Open calculatorOvulation Calculator
Estimate ovulation day number from cycle length and luteal phase length.
Region sensitive | Static formula
Open calculatorP-value Calculator
Approximate two-tailed p-value from a z-score.
Global | Static formula
Open calculatorPace Calculator
Calculate pace from time and distance.
Global | Static formula
Open calculatorPaint Calculator
Estimate paint needed from area, coverage and coats.
Global | Static_formula
Open calculatorPaint Cost Calculator
Estimate paint cost from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorParallelogram Area Calculator
Calculate parallelogram area from base and height.
Global | Static_formula
Open calculatorParental Leave Pay Calculator
Calculate parental leave pay from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorPassword Generator
Generate a random numeric password of a selected length.
Global | Static formula
Open calculatorPaver Calculator
Calculate paver from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorPayback Period Calculator
Calculate years needed to recover an investment from annual cash flow.
Global | Static formula
Open calculatorPayment Calculator
Estimate the periodic payment required to amortize a balance.
Region sensitive | Static formula
Open calculatorPension Calculator
Estimate annual pension income from salary, service years and accrual rate.
Region sensitive | Static formula
Open calculatorPercent Error Calculator
Calculate percent error between measured and accepted values.
Global | Static formula
Open calculatorPercent Off Calculator
Calculate sale price and savings from a percent-off discount.
Global | Static formula
Open calculatorPercent to Decimal Calculator
Convert a percentage to a decimal.
Global | Static_formula
Open calculatorPercentage Calculator
Calculate percent of a number, part as percent of whole, percentage change, percentage-point difference, increase/decrease and whole-from-part.
Global | Static_formula
Open calculatorPeriod Calculator
Estimate next period day number from last period and cycle length.
Region sensitive | Static formula
Open calculatorPermutation and Combination Calculator
Calculate nPr and nCr for non-negative integers.
Global | Static formula
Open calculatorPersonal Loan Calculator
Estimate personal loan monthly payment.
Region sensitive | Static formula
Open calculatorPizza Dough Calculator
Calculate pizza dough from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorPMI Calculator
Calculate pmi from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorPortfolio Rebalancing Calculator
Calculate portfolio rebalancing from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorPotential Energy Calculator
Calculate gravitational potential energy.
Global | Static_formula
Open calculatorPower Calculator
Calculate power from work and time.
Global | Static_formula
Open calculatorPPI Calculator
Calculate screen pixel density from resolution and diagonal size.
Global | Static formula
Open calculatorPregnancy Conception Calculator
Estimate conception day offset from due date day number.
Region sensitive | Static formula
Open calculatorPregnancy Due Date Calculator
Estimate due date from last menstrual period or conception date with uncertainty clearly explained.
Global | Static_formula
Open calculatorPregnancy Weight Gain Calculator
Compare current gain with a user-entered recommended range.
Region sensitive | Static formula
Open calculatorPresent Value Calculator
Discount a future value back to today.
Region sensitive | Static formula
Open calculatorPressure Calculator
Calculate pressure from force and area.
Global | Static_formula
Open calculatorPrime Factorization Calculator
Count prime factors of a positive integer.
Global | Static formula
Open calculatorProbability Calculator
Calculate simple probability from favorable and total outcomes.
Global | Static formula
Open calculatorProfit Calculator
Calculate profit and profit margin from revenue and cost.
Global | Static_formula
Open calculatorProrated Rent Calculator
Calculate prorated rent from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorProtein Calculator
Calculate daily protein grams from body weight and grams per kilogram.
Region sensitive | Static formula
Open calculatorPublic Holiday Calendar Calculator
Show a public holiday calendar for a selected country and year using Nager.Date, with weekday, weekend and regional notes.
Country specific | Live_api_dependent_data
Open calculatorPyramid Volume Calculator
Calculate pyramid volume from base area and height.
Global | Static_formula
Open calculatorPythagorean Theorem Calculator
Calculate hypotenuse from two right-triangle legs.
Global | Static formula
Open calculatorQuadratic Formula Calculator
Calculate the real roots of ax^2 + bx + c when they exist.
Global | Static formula
Open calculatorRace Predictor Calculator
Calculate race predictor from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorRandom Number Generator
Generate a random number between a minimum and maximum.
Global | Static formula
Open calculatorRange Calculator
Calculate statistical range from a list of numbers.
Global | Static_formula
Open calculatorRatio Calculator
Convert two numbers into a simplified ratio.
Global | Static formula
Open calculatorRatio to Percent Calculator
Convert part and whole values to a percentage.
Global | Static_formula
Open calculatorReal Estate Calculator
Estimate net proceeds from a property sale.
Region sensitive | Static formula
Open calculatorRebar Calculator
Calculate rebar from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorRecipe Scaling Calculator
Scale ingredient amount from original servings to target servings.
Global | Static formula
Open calculatorRectangle Area Calculator
Calculate rectangle area from length and width.
Global | Static_formula
Open calculatorRectangle Perimeter Calculator
Calculate rectangle perimeter from length and width.
Global | Static_formula
Open calculatorRectangular Prism Volume Calculator
Calculate box volume from length, width and height.
Global | Static_formula
Open calculatorRefinance Calculator
Estimate monthly savings from refinancing a loan.
Region sensitive | Static formula
Open calculatorRent Calculator
Estimate monthly rent as a share of monthly income.
Region sensitive | Static formula
Open calculatorRent vs. Buy Calculator
Compare total rent cost with simplified owner cost over a period.
Region sensitive | Static formula
Open calculatorRental Property Calculator
Estimate monthly rental cash flow.
Region sensitive | Static formula
Open calculatorReorder Point Calculator
Calculate reorder point from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorRepayment Calculator
Estimate monthly repayment for a fixed balance and term.
Region sensitive | Static formula
Open calculatorResistor Calculator
Calculate resistance from voltage and current.
Global | Static formula
Open calculatorRetirement Calculator
Estimate retirement savings trajectory with return, inflation and withdrawal assumptions clearly shown.
Region sensitive | Static_formula
Open calculatorRetirement Withdrawal Longevity Calculator
Estimate retirement withdrawal longevity from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorRevenue Calculator
Calculate revenue from unit price and quantity sold.
Global | Static_formula
Open calculatorRice to Water Ratio Calculator
Calculate rice to water ratio from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorRight Triangle Calculator
Calculate hypotenuse and area of a right triangle.
Global | Static formula
Open calculatorRMD Calculator
Estimate a required minimum distribution using a user-entered distribution period.
Region sensitive | Static formula
Open calculatorROI Calculator
Calculate return on investment percentage from return value and investment cost.
Global | Static_formula
Open calculatorRoman Numeral Converter
Convert an integer from 1 to 3999 into a Roman numeral.
Global | Static formula
Open calculatorRoof Pitch Calculator
Calculate roof pitch per 12 units of run.
Global | Static_formula
Open calculatorRoofing Calculator
Estimate roof surface area from footprint area and pitch factor.
Global | Static formula
Open calculatorRoot Calculator
Calculate nth root of a number.
Global | Static formula
Open calculatorRoth IRA Calculator
Project an after-tax retirement account with annual contribution assumptions.
Region sensitive | Static formula
Open calculatorRounding Calculator
Round a number to a selected number of decimal places.
Global | Static formula
Open calculatorRSU Calculator
Calculate rsu from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorRunway Calculator
Estimate runway from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorS&P 500 Return Calculator
Calculate s&p 500 return from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | External data user entered mode
Open calculatorSaaS Pricing Calculator
Calculate saas pricing from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorSafe Withdrawal Rate Calculator
Calculate safe withdrawal rate from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorSafety Stock Calculator
Calculate safety stock from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorSalary Calculator
Convert gross pay between hourly, daily, weekly, biweekly, monthly and annual amounts with overtime and unpaid-time assumptions.
Region sensitive | Static_formula
Open calculatorSales Tax / VAT Calculator
Add or remove a user-entered sales tax or VAT rate with quantity, discount, rounding and inclusive/exclusive breakdown.
Region sensitive | Static_formula
Open calculatorSample Size Calculator
Estimate sample size for a proportion with confidence z and margin of error.
Global | Static formula
Open calculatorSavings Calculator
Project savings growth from a starting balance and monthly deposit.
Region sensitive | Static formula
Open calculatorSavings Rate Calculator
Estimate savings rate from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorSavings Runway Calculator
Estimate savings runway from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorScientific Calculator
Perform common scientific operations on a single value.
Global | Static formula
Open calculatorScientific Notation Calculator
Convert a number to scientific-notation components.
Global | Static formula
Open calculatorShoe Size Conversion
Convert foot length in centimeters to an approximate EU shoe size.
Global | Static formula
Open calculatorSimple Interest Calculator
Calculate simple interest from principal, annual rate and time.
Global | Static_formula
Open calculatorSleep Calculator
Calculate wake time after a number of sleep cycles.
Region sensitive | Static formula
Open calculatorSlope Calculator
Calculate slope from two points.
Global | Static formula
Open calculatorSocial Security Calculator
Estimate benefit income from a user-entered monthly benefit and claiming duration.
Region sensitive | Static formula
Open calculatorSoil Volume Calculator
Estimate soil volume from area and depth.
Global | Static formula
Open calculatorSolar Panel Savings Calculator
Estimate solar panel savings from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorSpeed Calculator
Calculate speed from distance and time.
Global | Static formula
Open calculatorSphere Surface Area Calculator
Calculate sphere surface area from radius.
Global | Static_formula
Open calculatorSphere Volume Calculator
Calculate sphere volume from radius.
Global | Static_formula
Open calculatorSquare Area Calculator
Calculate square area from side length.
Global | Static_formula
Open calculatorSquare Footage Calculator
Calculate area in square feet from length and width in feet.
Global | Static formula
Open calculatorSquare Root Calculator
Calculate the square root of a non-negative number.
Global | Static_formula
Open calculatorStair Calculator
Calculate step count from total rise and target riser height.
Global | Static formula
Open calculatorStair Slope Calculator
Calculate stair or ramp angle from rise and run.
Global | Static_formula
Open calculatorStandard Deviation Calculator
Calculate sample or population standard deviation with mean, variance, range, quartiles, median and IQR.
Global | Static_formula
Open calculatorStatistics Calculator
Calculate mean and basic spread from count, sum and sum of squares.
Global | Static formula
Open calculatorStock Option Value Calculator
Calculate stock option value from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | User entered data
Open calculatorStock Total Return Calculator
Calculate stock total return from user-entered values with a visible formula, assumptions, limitations and source notes. Use dated source values for any market, distribution, regional or price-sensitive input.
Region sensitive | External data user entered mode
Open calculatorStorage Converter
Convert gigabytes to megabytes and terabytes using decimal units.
Global | Static formula
Open calculatorStudent Loan Calculator
Estimate a student loan payment from balance, rate and repayment term.
Region sensitive | Static formula
Open calculatorSubscription Cost Calculator
Estimate subscription cost from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorSurface Area Calculator
Calculate rectangular prism surface area.
Global | Static formula
Open calculatorTake-Home Paycheck Calculator
Estimate take-home pay from gross pay and user-entered deduction rates.
Region sensitive | Static formula
Open calculatorTarget Heart Rate Calculator
Estimate target heart-rate zone from age and intensity range.
Region sensitive | Static formula
Open calculatorTDEE Calculator
Estimate total daily energy expenditure from BMR and activity multiplier.
Region sensitive | Static formula
Open calculatorTest Score Calculator
Calculate correct answers, missed answers and score percentage.
Global | Static formula
Open calculatorTile Calculator
Estimate tile count from area, tile area and waste percent.
Global | Static_formula
Open calculatorTime Calculator
Calculate time from distance and speed.
Global | Static_formula
Open calculatorTime Card Calculator
Calculate weekly hours from regular daily hours and workdays.
Global | Static formula
Open calculatorTime Duration Calculator
Calculate differences between times and add or subtract hours, minutes and seconds.
Global | Static_formula
Open calculatorTime Zone Calculator
Convert an hour using UTC offsets.
Global | Static formula
Open calculatorTime Zone Difference Calculator
Calculate time difference between two UTC offsets.
Global | Static formula
Open calculatorTip Calculator
Calculate tip, total and split amounts with quick presets and simple rounding.
Region sensitive | Static_formula
Open calculatorTire Diameter Calculator
Estimate tire diameter from width, aspect ratio and wheel diameter.
Global | Static formula
Open calculatorTire Size Calculator
Calculate tire diameter from width, aspect ratio and wheel size.
Global | Static formula
Open calculatorTotal Compensation Calculator
Calculate total compensation from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorTrapezoid Area Calculator
Calculate trapezoid area from two bases and height.
Global | Static_formula
Open calculatorTravel Cost Split Calculator
Split a travel cost between people.
Global | Static formula
Open calculatorTriangle Area Calculator
Calculate triangle area from base and height.
Global | Static_formula
Open calculatorTriangle Calculator
Calculate triangle area from base and height.
Global | Static formula
Open calculatorTriangle Perimeter Calculator
Calculate triangle perimeter from three side lengths.
Global | Static_formula
Open calculatorTrip Time Calculator
Estimate trip time from distance and average speed.
Global | Static formula
Open calculatorUnit Converter
Convert common units across length, mass, temperature, volume, area, speed and more.
Global | Static_formula
Open calculatorURL Encode / Decode
Percent-encode text for use in URLs.
Global | Static formula
Open calculatorVA Mortgage Calculator
Estimate mortgage payment with a user-entered funding fee.
Region sensitive | Static formula
Open calculatorVAT Calculator
Add or remove value-added tax using a user-entered VAT rate.
Region sensitive | Static formula
Open calculatorVO2 Max Estimate Calculator
Estimate vo2 max estimate from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorVoltage Drop Calculator
Estimate voltage drop from current, resistance and one-way length.
Global | Static formula
Open calculatorVolume Calculator
Calculate rectangular prism volume.
Global | Static formula
Open calculatorWallpaper Calculator
Estimate wallpaper rolls from wall area and roll coverage.
Global | Static formula
Open calculatorWavelength Calculator
Calculate wavelength from wave speed and frequency.
Global | Static_formula
Open calculatorWedding Budget Calculator
Estimate wedding budget from user-entered values with a visible formula, assumptions, limitations and source notes.
Global | User entered data
Open calculatorWeeks Between Dates Calculator
Convert a day count into weeks.
Global | Static formula
Open calculatorWeight Calculator
Calculate weight force from mass and gravitational acceleration.
Global | Static formula
Open calculatorWeight Watcher Points Calculator
Estimate generic food points from calories, fat and fiber inputs.
Region sensitive | Static formula
Open calculatorWeighted Grade Calculator
Calculate a weighted course grade from two category scores and weights.
Global | Static formula
Open calculatorWind Chill Calculator
Calculate wind chill from temperature in F and wind speed in mph.
Global | Static formula
Open calculatorWork Calculator
Calculate work from force and distance.
Global | Static_formula
Open calculatorWorking Days Until Date Calculator
Count working days from today or a selected start date to a target date, excluding weekends and Nager.Date public holidays.
Country specific | Live_api_dependent_data
Open calculatorZ-score Calculator
Calculate z-score from value, mean and standard deviation.
Global | Static formula
Open calculator