BTU Calculator
Calculate the BTUs needed to heat or cool your room or home.
About BTU Calculations
BTU stands for British Thermal Unit, a measurement of heat energy. One BTU is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit.
How to Use This Calculator
1. Select whether you're calculating for a single room or an entire house.
2. Enter the square footage of the area.
3. If calculating for a room, enter the ceiling height.
4. Choose your insulation quality, climate, and number of windows.
5. Click "Calculate BTUs" to get the recommended BTU rating.
Factors Affecting BTU Requirements
- Room or house size
- Ceiling height
- Insulation quality
- Climate
- Number of windows and doors
- Direction the room faces
- Number of people regularly in the space
Remember: It's better to slightly overestimate than underestimate your BTU needs, as an underpowered unit will struggle to maintain temperature and use more energy.