Electricity Cost Calculator
Calculate the running cost of any appliance per day, month and year.
Your details
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How the electricity cost calculator works
Convert watts to kilowatts, multiply by hours of use to get kWh, then multiply by your tariff.
Formula
cost = watts ÷ 1000 × hours × price per kWh
Worked example
A 1,200 W heater for 3 hours a day at $0.28/kWh costs about $30.68 a month.
Frequently asked questions
Does standby power matter?
Yes. A few watts running 24/7 can add up to more than occasional high-power use.