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Electricity Cost Calculator

Find what an appliance costs to run per hour, day, month and year from its wattage and your power price.

  1. Enter your numbers
  2. Results update as you type
  3. Copy the answer or share the link
Runs in your browser. Your data and files never leave your device.

About the Electricity Cost Calculator

Check how much a heater, air conditioner, fridge, computer or EV charger costs to run. Enter the power rating in watts, how long it runs and your electricity price per kWh.

Electricity Cost Calculator formula

cost = watts ÷ 1000 × hours × price per kWh

Example

A 2,000 W heater run 3 hours a day at $0.32/kWh costs about $1.92 a day, or $700 a year.

Frequently asked questions

Where do I find my price per kWh?

On your electricity bill, usually shown in cents per kWh. Use the price for the time of day you run the appliance if you have time-of-use pricing.

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