Room Heating Calculator

Calculate your heating requirements in BTU’s or Watts with our online Room Heating Calculator. For use in selecting Heated Towel Rails, Electric Panel Heaters & Designer Radiators. Enter dimensions, room features and internal / external properties. 

Room Heating Calculator

Length of room(M)



Floor Type


Wall Type



Window Type


Outside Walls




Other useful room heating calculator resources

BTU Calculator at Calculator.net

Wikihow – How To Calculate BTU per square foot.

DIYDoctor – Radiator sizing.

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