Running costs & power consumption for fan heaters, convector heaters, oil-filled radiators and halogen heaters

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Electric Heating Energy Calculator

Electric heaters, whether they are fan heaters, oil-filled radiators or convector heaters are rated in Watts (W) or Kilowatts (kW). Find out what your heater is rated at, then use our energy calculator to see how much it will cost to run per hour, day or week.

Supplier & tariff:

Power Rating	Cost/Hour	Cost/Day*	Cost/Week
500W	6.99p	£0.56	£3.91
750W	10.48p	£0.84	£5.87
1kW	13.97p	£1.12	£7.82
1.5kW	20.95p	£1.68	£11.73
2kW	27.94p	£2.24	£15.65
2.5kW	34.92p	£2.79	£19.56
3kW	41.91p	£3.35	£23.47

*based on 8 hrs a day at the National Average rate of 13.97p/kWh (Dec 2009 tariff) for a unit of electricity.

If you are about to replace your central heating or are building a new house please visit: DEFRA (Department for Environment Food and Rural Affairs) as they maintain a Boiler Efficiency Database which allows you to view the SAP seasonal efficiency of thousands of Gas, LPG and Oil Boilers.

Air Conditioning Units are listed in our work section - click here to view their power consumption.