basic

Home Cooling BTU Load Calculator

BTU/hr = area × ceiling × insulation × climate factor.

Estimates the BTU/hour cooling capacity needed to air-condition a room from its area, ceiling height, insulation, and climate.

Nadia Almasri By Nadia Almasri
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

BTU/hr ≈ area_sqft × 25 × climate_factor × insulation_factor

In depth

Estimates the BTU/hour cooling capacity needed to air-condition a room from its area, ceiling height, insulation, and climate.