0 BTU/hr
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AC size (tons)
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Room area
Rule of thumb: ~20 BTU per sq ft, adjusted for sun and occupancy; 12,000 BTU = 1 ton. Hot, humid climates may need a little more.
Frequently Asked Questions
What size air conditioner do I need?
A common estimate is about 20 BTU per square foot of room, adjusted for sun exposure and the number of people. Divide the BTU by 12,000 to get the AC size in tons.
Estimate the BTU and AC tonnage needed to cool a room of a given size.