Pick the appliance, set how long it runs, and enter your electricity price. You get the cost per hour, per week and per year.
Typical use for each appliance at your electricity price. Tap a bar to load it into the calculator.
Convert the power to kilowatts, multiply by the hours it runs, then multiply by your price per kWh. A 2.4 kW heater running for 1 hour at 33 c/kWh costs 2.4 × 1 × 0.33 = about 79 cents.
No. Once the room warms up, the thermostat switches the element on and off. In a typical room a heater might run at full power 50 to 80 percent of the time, which is what the "time at full power" setting allows for.
Look on your power bill for the usage charge, shown in cents or pence per kWh. If you are on a time-of-use plan, use the rate for the time the appliance usually runs.
Usually yes. A reverse-cycle air conditioner moves heat instead of making it, so it delivers around 3 to 4 kW of heat for every 1 kW of electricity. That makes it roughly a third of the running cost of a plug-in electric heater.