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Radiator BTU calculator
The heat output or 'BTU' (British Thermal Unit) calculator is a great way 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. Please note: You may need several radiators for bigger rooms.
How do I choose the right radiator?
The BTU value of all our radiators is clearly labelled in-store and online, helping you find those which suit your requirements.
Length
Width
Height
Your BTU result
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BTU