Space Heater Cost Calculator: 1500W Running Cost Per Hour, Day and Month
See what an hour of 1500W heat really adds to a winter bill. Adjust the wattage, runtime and your own electricity rate below — every figure updates instantly in your browser, and nothing you type is sent anywhere.
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How this cost is calculated
The formula is kWh = watts ÷ 1000 × hours, then cost = kWh × your rate per kWh. Standing charges and tiered or time-of-use pricing are billed separately by your supplier, so treat these numbers as the marginal cost of running this appliance rather than a full bill.
For the full breakdown with regional price tables, read the detailed guide, or estimate your whole household on the home electricity bill calculator.
Frequently asked questions
How much does it cost to run a 1500W heater for 24 hours?
1500W for 24 hours is 36 kWh, about $5.76 at $0.16/kWh in the US or roughly £9.36 at 26p/kWh in the UK.
Is a space heater cheaper than central heating?
Heating one occupied room with a 1500W heater (about $0.24/hour) is usually cheaper than running whole-home heating, but heating three or more rooms this way costs more.
Do ceramic or infrared heaters use less electricity?
No. Every plug-in electric resistance heater is about 100% efficient, so 1500W costs the same regardless of type; only heat pumps beat it.