Home & travel tools
Electricity Cost Calculator
Estimate appliance electricity cost from watts, hours of use, and your utility rate.
Estimate how much it costs to run an electrical appliance based on its wattage, daily use, and the electricity rate from your utility bill.
Watts to kilowatt-hours
Divide watts by 1,000 to get kilowatts, then multiply by hours used. A 1,000-watt device used for two hours consumes about 2 kWh.
Use your actual rate
Electric bills can include tiers, delivery charges, taxes, fixed fees, and time-of-use pricing. Enter the per-kWh rate that best matches your situation.
Rated power versus actual power
Many appliances cycle on and off or vary power. Nameplate wattage can therefore overstate or understate typical consumption.
Frequently asked questions
Where do I find watts?Check the device label, manual, manufacturer specifications, or a plug-in power meter.
Does this estimate my whole electric bill?No. It estimates one device's energy charge under a simple rate assumption.