How to estimate appliance cost
Find watts, usage time and your tariff.
1
Find the wattage
Use the appliance label or manual.
2
Estimate hours
Use average daily use, not the maximum.
3
Enter your tariff
Use the price per kWh from your bill.
What does this tool do?
An appliance’s energy use is its wattage multiplied by time. This calculator converts that into kilowatt-hours and then into money using your electricity rate, so you can compare devices or plan a budget.
The Formula
kWh = Watts × Hours × Days ÷ 1000; Cost = kWh × Price per kWhFrequently Asked Questions
How do I find an appliance’s wattage?
Check the label or manual. If only amps and volts are given, multiply them: watts = amps × volts.
Does standby power matter?
It can. A device drawing 5 W continuously uses about 44 kWh a year; multiply by your rate to see the cost.