BTUCalc

Room size by BTU

What room size each window/portable AC BTU rating cools, with the tonnage equivalent. Pick a size, or run your exact room through the calculator.

5,000 BTU

0.4 ton

≈ 250 sq ft

6,000 BTU

0.5 ton

≈ 300 sq ft

8,000 BTU

0.7 ton

≈ 400 sq ft

10,000 BTU

0.8 ton

≈ 500 sq ft

14,000 BTU

1.2 ton

≈ 700 sq ft

15,000 BTU

1.3 ton

≈ 750 sq ft