Aircon BTU size calculator

Find out roughly what cooling capacity (BTU) your room needs before you get quotes for a new unit. Undersized units run constantly and cost more to operate, while oversized units waste money upfront.

Recommended cooling capacity

8,000 - 9,500 BTU

This is a rule-of-thumb BTU figure; a contractor will confirm the exact size based on ceiling height, insulation and window area.

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Get quotes from top-rated air conditioning contractors

Ranked by our published rubric from recent Google reviews, weighted by relevance to this service (the same order as the category page).

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