Enter the room size and conditions. The calculator estimates the cooling capacity in BTU per hour and kilowatts, and the nearest common unit size.
Last updated: · By Furkan Çetinkaya · About & Methodology
Cooling needed
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The rule of thumb is 20 BTU per square foot (about 215 BTU per m²), reduced 10% for shaded rooms and raised 10% for very sunny ones. Each person beyond two adds 600 BTU, and kitchens add 4,000 BTU.
1 kW of cooling is about 3,412 BTU/h.
No. An oversized unit cools quickly but switches on and off often and removes less humidity.
About 4,300 BTU/h for a normal room — a 5,000 or 6,000 BTU unit.