BTU Calculator

Rough room cooling BTU/hr from room area.

BTU Calculator helps you rough room cooling BTU/hr from room area. Enter room area and btu per unit area, review the breakdown, and use the guidance below to understand what the number means — and what it does not. What the BTU calculator does BTU Calculator is built for everyday questions — shopping, home, travel, hobbies, and tech. Rough room cooling BTU/hr from room area. You enter room area and btu per unit area, then Simple Calculators computes the result instantly. Defaults are chosen to be easy to read — change any field to match your situation. How the math works Pick Units, enter the Room area (floor area, length × width) and the BTU per unit area — about 20 BTU per ft² or 215 BTU per m² is a common starting point. BTU per hour = room area × BTU per unit area. The calculator also shows tons of cooling (BTU ÷ 12,000) and kilowatts. It does not allow for sun, insulation, ceiling height or the number of people. The formula: BTU/hr = room area × BTU per square foot (about 20). 1 ton of air-conditioning = 12,000 BTU/hr.