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Electricity cost calculator

What an appliance costs to run per day, month and year, from its watts, the hours you use it and your price per kWh.

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On your bill. The US average is around $0.18 per kWh.

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Per month $32.85

How it works

cost = watts × hours ÷ 1,000 × price per kWh

Your bill charges for energy in kilowatt-hours (kWh): 1,000 watts running for one hour. Multiply the appliance’s watts by the hours it runs and divide by 1,000 to get kWh, then multiply by your price. The wattage on the label is the most it draws; fridges, heaters and air conditioners cycle on and off, so use about half the label figure for those, or measure with a plug-in meter. Your bill lists the price per kWh, including delivery charges if you divide the total by the kWh used.

  1. Watts × hours ÷ 1,000 = kWh 1,500 W × 4 h ÷ 1,000 = 6 kWh
  2. Times your price 6 kWh × $0.18 = $1.08
  3. A year, and a month on average $1.08 × 365 = $394.20 · ÷ 12 = $32.85

Printed from rocketcalc.io/tech/electricity-cost