Electricity cost by appliance
Choose an appliance for an editable daily, monthly, and annual cost estimate. Presets are starting points, so use the wattage on your own device whenever possible.
Illustrative preset
Window air conditioner
1,500 W · 6 hours/day
Illustrative preset
Refrigerator
150 W · 8 hours/day
Illustrative preset
Electric water heater
4,500 W · 2 hours/day
Illustrative preset
Clothes washer
500 W · 0.5 hours/day
Illustrative preset
Clothes dryer
3,000 W · 0.75 hours/day
Illustrative preset
Space heater
1,500 W · 4 hours/day
Calculation
Convert watts into energy cost
The calculator converts watts to kilowatts, multiplies by daily operating time, then applies your electricity rate. Monthly estimates use 30 days and annual estimates use 365.
Accuracy
Account for cycling and settings
Many appliances do not draw their rated power continuously. Use a measured average or duty-cycle equivalent when available, especially for refrigerators and thermostatically controlled equipment.