Heating

Electric Radiator Running Cost Calculator

By HowMuchWatts Editorial Team Reviewed June 30, 2026 Formula and source method

Electric radiators turn power straight into heat, so wattage directly drives cost. Enter yours to see the daily and seasonal running cost.

Change any number below — your result updates instantly, no button to click.

Your details

Results

Cost per day

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Cost per month

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Cost per heating season

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Optional next step

Measure or improve the real-world result

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Smart thermostatAutomates setbacks to capture the savings from the thermostat calculator.See options Smart radiator/space-heater plugSchedule electric heating so it only runs when needed.See options

Written & maintained by the HowMuchWatts team · Last updated June 30, 2026 · How we verify our numbers

How it works

Daily cost = watts ÷ 1000 × hours per day × rate. Monthly cost = daily × 30.4. Seasonal cost = daily × heating days per year. Like all electric resistance heating, a thermostat or timer that limits run time is the main way to save.

Frequently asked questions

Are “efficient” electric radiators cheaper to run?

For the same heat output, no — all electric resistance heaters are ~100% efficient. Smart controls help by heating less, but a heat pump is the real efficiency upgrade.

Electric radiator vs central heating?

For heating a whole home continuously, gas central heating or a heat pump is usually cheaper. Electric radiators suit heating one room occasionally.

Do thermostats save money?

Yes — a thermostat cuts power once the room is warm, so the heater is not running at full wattage the whole time.

These calculators provide general estimates for educational purposes only and are not financial advice. Real-world results depend on factors not captured here. Verify figures independently before making any purchase or financial decision.

Complete topic guide Home Heating & Cooling Costs Compare heating and cooling running costs, seasonal efficiency, upgrades, and payback with transparent calculators and practical decision guidance.

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