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Electricity cost calculator

Turn appliance wattage and daily use into running cost per day, month, and year at your electricity tariff.

Enter a wattage, usage pattern, and tariff to price the appliance.

Energy in kWh = watts over 1000, times hours, times days; cost = kWh times the tariff. The month is your days-per-month figure and the year is that month times 12, so 30 days keeps the whole estimate one consistent approximation. Standby draw, tiered tariffs, time-of-use pricing, and fixed connection charges are not modeled. Tariff is a bare number; read it off your bill in your own currency per kWh. Repeat per appliance and add the results for a whole-home figure.
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