What size air conditioner (BTU and ton) your room needs, for hot climates like Pakistan, India and the Gulf.
How this works
Base load per m²: mild climate 320 BTU, hot 650 BTU, very hot (45°C+) 860 BTU. Sunny or top-floor rooms add 20%, shaded rooms take off 10%. Each person over 2 adds 600 BTU and a kitchen adds 4,000 BTU. 1 ton = 12,000 BTU.
Questions people ask
How do I use the AC Size Calculator?
Fill in the fields, starting with “Room length”, “Room width” and “Ceiling height”, and change any other options that match your home. The answer, a drawing and practical tips update as you type, and the Copy link button saves your numbers in a link you can share.
Is the AC Size Calculator free?
Yes. The AC Size Calculator is free, with no sign-up, and works on phones, tablets and computers. The results are estimates to help you plan, so check with a qualified professional before structural, electrical, gas or plumbing work.