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Air Conditioner Sizing (BTU & Horsepower) Calculator

Calculate cooling BTU and Aircon Horsepower (HP) for room dimensions.

Tool inputs stay in your browser · optional AI search sends your query

Good to know: Estimates air conditioning capacity needed per room square meters to ensure energy-efficient cooling.

How to use it (step by step)

  1. 1Fill in the boxes: “Room Floor Area (square meters)”, “Sunlight Exposure”, “Average number of people in room”. Example numbers are already there so you can see how it works; replace them with yours.
  2. 2The result updates instantly as you type (on a phone it is below the boxes).
  3. 3The bold line is the main answer. Tap Copy next to any value to copy it.

Words to know

Average (mean) / median
Average = add everything and divide by how many. Median = the middle value when sorted; it is not pulled by extreme values.
Area / volume / perimeter
Perimeter = distance around a shape. Area = the flat space inside it (m²). Volume = the space inside a 3D object (m³).

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