Unit Converter
Convert common units across length, mass, temperature, volume, area, speed and more.
Open calculatorWhat this category helps with
Unit converters help with questions where a number is useful but the assumptions matter. Start with the calculator closest to your question, then use the linked guide or formula page when units, rates, dates, local rules or source data could change the answer.
Best starting points
Conversion Calculator
Convert a value using a user-entered conversion factor.
Open calculatorShoe Size Conversion
Convert foot length in centimeters to an approximate EU shoe size.
Open calculatorHow to choose the right calculator
- Use a broad calculator first when you need a quick estimate.
- Use a more specific calculator when rates, units, dates, eligibility or fees change the answer.
- Read assumptions before comparing results across calculators or external sources.
- For current-data topics, confirm the data source and date before relying on the result.
Calculators
Unit Converter
Convert common units across length, mass, temperature, volume, area, speed and more.
Open calculatorConversion Calculator
Convert a value using a user-entered conversion factor.
Open calculatorShoe Size Conversion
Convert foot length in centimeters to an approximate EU shoe size.
Open calculator