Calculate Your Room's Heating Requirements

Use the options below to calculate your heat output requirements for both central heating systems (BTUs) and electric heating (watts). You can save every room in your house and then print out the results.

Heating Type
Preferred Metric
Room Location
Room Name (Optional)

Note: Average British Room Height is 2.4 metres / 8 foot high

Window Glazing
Double glazing Double
Single glazing Single
2
Window Area
External Wall Type
Insulated walls Insulated
Cavity walls Cavity
Solid walls Solid
External facing wall length

Total length of all walls facing outside, in a typical home this will be equal to the length+width of the room.

This Room

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