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BTU Calculator

Choosing the right radiator or towel warmer for you bathroom or living rooms within your home is important not only in style but also to make sure your room remains warms. Radiators come with an output value measured in BTU's  (British Thermal Unit), but how do you know what size BTU you need?

Our heat output or 'BTU'calculator make it easy for you to work out how much radiator power you need. There are several factors which can affect this, such as room dimensions, heating levels and types of window, which are all covered in our radiator BTU calculator below.

1. Select measurement type
Metric (metres) Imperial (feet)
2. Your room dimensions
Height of room:
Width of room:
Length of room:
Window Area x2:
3. Type of room:
4. What is below the room?
5. What is above the room?
6. Select type of outside wall:
7. Select type of window:
8. Select number of outside walls:

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