Use your actual tariff
This calculator does not fetch live electricity prices. Enter the price per kWh from your bill or tariff. Real bills can include fixed charges, time-of-use rates, taxes and grid fees.
Example
An appliance using 1,200 watts for 1 hour, 200 times per year, uses 240 kWh annually. At 0.20 per kWh, the active-use cost is about 48 per year before standby power or fixed bill charges.
Common mistakes
Watts and kilowatts are easy to mix up. A 1,200 W appliance is 1.2 kW, not 1,200 kW. Also check whether the appliance cycles on and off; the nameplate wattage may not equal average draw over a full use.
Limitations
The estimate is best for comparing appliances or habits. It does not model seasonal tariffs, demand charges, solar self-consumption, battery storage or utility taxes.
Last reviewed: 2026-05-17