Calculate your room's BTU requirement

Our easy BTU calculator will help you avoid over- or under-spending, or turning your cloakroom into the ideal place to cook a turkey.

Choosing a radiator or heated towel rail with a suitable heat output is essential. Use our tool to learn what heat requirement your room needs, and the only thing left to do is to choose the your perfect radiator that hits that heat output target and looks good in your chosen space. Before getting started you'll need the following:

  • A tape measure (or one of those cool laser measurement tools)
  • A home (recommended)
  • And that's it!

Pop your room type, measurements and details below and you'll have your required BTU heat output (measured at Delta-T 50°C) within a couple of clicks. Easy.

Room Dimensions

Room information

To heat your room you will need:

(heat output requirements)

BTU/hr: 0 to 0

Watts: 0 to 0