BTU Calculator

The cooling capacity of an air conditioning unit is measured in British Thermal Units (BTU). The BTU rating is a measure of how much cooling the unit can provide. The required rating of a unit can be calculated on the basis of several factors, the most important of which is the area (size of the room) it must keep at a comfortable temperature. Other factors such as the type, location and construction of the room are important as well.

The BTU calculator below has been supplied for your convenience. Please note that this BTU calculator is only a guide. The exact calculation will vary, depending on location, number of occupants, number of electrical devices, the amount of glazing, floor finishes, etc. A final heat load calculation should always be performed by a qualified person. We will be happy to do this for you!

Room Type

Living Room
Dining Room
Hallway/Passage
Kitchen
Bedroom
Bathroom

Building Insulation

Sheltered
Average
Exposed

Window Glazing

Single
Double

Room Area

Length (M)

Width (M)

Height (M)

BTU
to
Watts
to

Note: These values are to be taken as an indication only.

This graph represents the amount of heating required (in BTU's) per area in square meters, the vertical scale is area from 15 - 135M² in increments of 15M². The horizontal scale represents heating required in BTU's from 6000 to 60000, increments are not linear but this is just a guide