About BTU Calculator
The BTU (British Thermal Unit) Calculator helps select the right size Air Conditioner or Space Heater.
Why Size Matters?
- Too Small: Won't cool/heat the space; runs continuously.
- Too Big: Cycles on/off too fast (short cycling), failing to dehumidify the air.
General Rules
A baseline for standard rooms is approx 20-25 BTUs per square foot. Factors like high ceilings, sun exposure, and kitchen appliances add load.
How to Use
Enter room dimensions. The tool provides a BTU range suitable for window AC units or mini-splits.