Electricity cost calculator

Find out what a heater, PC or fridge adds to your bill. You type your own rate, so it works anywhere.

How to calculate electricity cost

  1. 01Enter the device power in watts (check the label).
  2. 02Enter the hours it runs per day.
  3. 03Enter your price per kWh from your bill and read the cost.

FAQ

A kilowatt-hour is 1,000 watts used for one hour. A 100 W bulb on for 10 hours uses 1 kWh.