BTU Calculator
Cooling (AC) BTU
Heating BTU
Formula
Cooling: ~20 BTU/sq ft | 1 ton = 12,000 BTU
Frequently Asked Questions
How many BTUs do I need?
For cooling: roughly 20 BTU per sq ft. A 300 sq ft room needs ~6,000 BTU. For every extra person above 2, add 600 BTU. Adjust for sun exposure, ceiling height, and insulation.
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