BTU Calculator
Calculate heating and cooling requirements for your room. Find the right BTU capacity for air conditioners and heaters.
Cooling Capacity
10,400 BTU
calculators.btu.recommendations.mediumWindow
Heating Capacity
11,960 BTU
tons
0.9 Tons
Kilowatts
3 kW
Room Size
500 ft²
BTU Breakdown
Base Area
10,000 BTUHeat from Appliances
+400 BTUSize Guide
5,000 - 8,000 BTUSmall
9,000 - 13,000 BTUMedium
14,000 - 23,000 BTULarge
24,000+ BTUCentral
What is BTU?
BTU (British Thermal Unit) is a measure of heat energy. One BTU is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit.
Factors Affecting BTU
Room size is primary, but insulation, sun exposure, ceiling height, number of occupants, and local climate all affect the BTU requirement.
Proper Sizing
Proper sizing ensures comfort and efficiency. An undersized unit runs constantly, while an oversized unit cycles too often, both wasting energy and reducing comfort.