BTU Calculator

Need to calculate how many BTUs your air conditioner needs to be? Our handy calculator will give you the BTU value required for your room so that you can choose the right air conditioner to achieve optimal cooling performance.

There are lots of factors which can affect the exact BTU requirement for a room, such as wall and ceiling insulation, the direction the room faces, the size and condition of windows, and more. The type of room itself can also make a signficant difference; for example, a conservatory or loft will require a signficiantly stronger unit than a similarly sized bedroom. If in doubt, we recommend choosing a larger unit to be sure that it will effectively cool your room.

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Still need advice?

We're happy to help—please get in touch with us and we'll be able to give you more advice for deciding on the right air conditioner for you.

What does BTU mean?

BTU stands for British Thermal Unit. This is a way to measure how much energy something has. For example, one BTU is the amount of energy it would take to heat up one pound of water by 1° Fahrenheit. People usually use BTUs when they talk about things that heat or cool, like air conditioners.

Our air conditioning buying guide contains more information on air conditioner power requirements and everything else you need to know when deciding on the right air conditioner for you. For more air conditioning related articles click here.