BTU Heat Output Calculator

The BTU (British Thermal Unit) calculator can be used to work out how much radiator power you need.

Numerous factors can affect this, such as types of window and room dimensions. Feel free to use our BTU calculator below.

Metres Feet

Width

Length

Height

Dining room / Lounge / Bathroom

Bedroom

Kitchen / Common Area

Is your room North facing?

Does your room have French windows?

Does your room have double glazing?

Your room will require approximately 0 BTU's/hour

Enter your room dimensions in: