Calculate the BTU output needed for radiators in each room of your home.
BTU Required
5,691
1,667 Watts
Room Volume
33.6 m³
BTU Output
5,691
Watts
1,667 W
An undersized radiator will not heat the room adequately, while an oversized one wastes energy. The correct size depends on room volume, insulation, windows, and external walls.
Understanding your home energy usage is the first step towards reducing your bills. You may also find our Gas Heating BTU Calculator useful for related calculations.
For a broader view of your finances, try the Energy Bill Calculator or the Percentage Calculator. All of our calculators are free to use and updated for the 2026/27 tax year where applicable.
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