Electricity Cost Calculator
Find out what an appliance costs to run. Enter its wattage, how long it runs, and your electricity rate to get the daily, monthly, and yearly cost.
Cost Per Month
$2.55
30-day estimate
Cost Per Day
$0.09
Cost Per Year
$31.03
Energy Used Per Day
0.500 kWh
Energy Used Per Year
182.500 kWh
Frequently Asked Questions
How do I calculate the cost to run an appliance?
Divide the appliance's wattage by 1,000 to get kilowatts, then multiply by the hours you run it per day and by your electricity rate ($/kWh). For example, a 100 W device run 5 hours/day at $0.17/kWh costs 0.1 kW × 5 h × $0.17 = $0.085 per day.
Where do I find an appliance's wattage?
Check the nameplate label on the back or bottom of the appliance — it lists watts (W) or amps (A) and volts (V). If it shows amps and volts, multiply them: watts = volts × amps. Many manufacturers also publish wattage in the product spec sheet.
What is a kWh?
A kilowatt-hour (kWh) is the unit your utility bills you for. It equals one kilowatt (1,000 W) of power consumed for one hour. So a 1,000 W appliance run for one hour uses exactly 1 kWh; a 100 W appliance needs 10 hours to use 1 kWh.