Appliance energy cost calculator

Estimate how much electricity an appliance uses and what it costs to run each day, week, month and year, using your own electricity rate.

Calculator

How do you know its energy use?

Power and hoursWatts and how long it runsEnergy per cyclekWh per load, such as a washing machineEnergy per yearkWh/year from the energy labelIn use plus standbyActive use and standby watts

Appliance type

Used as the name in your comparison. It does not fill in any values.

Power

Rated input power from the label or manual. Appliances that cycle on and off use less on average.

Hours of use per day

On a day the appliance is used. Up to 24.

Days of use per week

Up to 7.

Electricity price per kWh

From your bill or supplier. Use the price per kWh, for example 0.15.

Currency

Changes the currency symbol only. No exchange rates are applied.

Estimated results

Fill in the fields to see the estimated energy use and cost.

Your comparison

Open the dashboard

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How the estimate works

Energy (kWh) = power (W) × hours ÷ 1,000

Cost = energy (kWh) × price per kWh

Example: a 1,500 W heater used for 2 hours uses 1,500 × 2 ÷ 1,000 = 3 kWh. At an illustrative price of $0.20 per kWh, that costs 3 × $0.20 = $0.60.

Time periods we use

Per day of use: Energy on a day the appliance is actually used.
Average calendar day: Weekly energy ÷ 7, spreading use across every day.
Average month: Annual energy ÷ 12. We never assume a 30-day month.
Year: Weekly energy × 365 ÷ 7 (a 365-day year).

Read the full methodology

An estimate, not your bill

Utility bills can include fixed or standing charges, taxes, time-of-use or tiered rates and other fees, so they will not match a running-cost estimate exactly. Read the disclaimer.