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Air conditioner BTU calculator

Estimate a BTU range from your room size, ceiling, sun exposure, people, and heat sources before comparing air conditioners.

See a practical capacity range for your room before comparing air conditioners.

A simplified area-based reference is adjusted for ceiling height, sunlight, additional people, heat sources, and intensive use.

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    How it works

    A simplified area-based reference is adjusted for ceiling height, sunlight, additional people, heat sources, and intensive use.

    Before you decide

    This is an initial estimate, not a thermal design. A manufacturer or installer may recommend another size after assessing climate, insulation, windows, and actual use.

    Frequently asked questions

    Does this replace a technical assessment?

    No. Climate, insulation, windows, sun orientation, and equipment affect cooling load.

    Why show a range?

    Commercial capacities come in steps, and this simplified calculation cannot capture every room condition.