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Answer a few questions about your room and we'll size it, estimate the running cost, and match you to the best-value units — no fluff, no sponsored rankings.

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BTU Calculator

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Room size

320 ft²≈ 20 × 16 ft room

Climate

Sun exposure

You need about

6,500–7,500 BTU

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Three ways to cool smarter

Size it right

Our BTU calculator factors in climate, sun, insulation and ceiling height — not just square footage.

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Sort 8 top units by efficiency, noise, price and smart features in one honest spec table.

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20 BTUper ft² is only the starting point — climate changes everything

40%of window ACs people buy are the wrong size for the room

$300+typical yearly saving from a right-sized, efficient unit

60 secaverage time to a recommendation with our calculator

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