British Thermal Unit (BTU) Heating Calculator - Just Radiators

BTU Calculator

What is a BTU Calculator?

Our BTU (British Thermal Units) calculator accurately works out the heat energy required for your room, per hour – so you can ensure that each room stays at a comfortable temperature, without wasting energy, or money.

How is BTU measured?

A single BTU value is determined by the amount of energy needed to raise 1 pound of water above sea level by 1oF, and is a calculation recognised around the world. By considering the dimensions, the windows and the type of room – this measurement can be used to work out how much energy is required to heat the room to a standard temperature (ranging between 18oc to 23oc).

How to use this BTU Calculator?

Simply answer the questions below, then receive your BTU calculation for the room, and explore our personalised recommendations on the radiators that will suit your requirements.

Remember that you can either combine multiple radiators, or stick to just one, to reach the BTU requirement.

BTU Calculator