Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Construction
HVAC BTU Calculator
Estimates the BTU per hour needed to heat or cool a room based on its size, ceiling height, and insulation quality. Use it to size an air conditioner, heat pump, or furnace before purchasing.
Fill in the required fields to see your result.
Construction
HVAC Load Calculator
Estimate the heating or cooling capacity (BTUs) your room needs based on size, ceiling height, insulation, and climate. Use this before sizing an air conditioner, heat pump, or furnace.
Fill in the required fields to see your result.
Key differences
| HVAC BTU Calculator | HVAC Load Calculator | |
|---|---|---|
| Category | Construction | Construction |
| Inputs required | 3 | 5 |
| Result | BTU Required (BTU/hr) | Required BTU/Hour (BTU/hr) |
| What it does | Estimates the BTU per hour needed to heat or cool a room based on its size, ceiling height, and insulation quality. Use it to size an air conditioner, heat pump, or furnace before purchasing. | Estimate the heating or cooling capacity (BTUs) your room needs based on size, ceiling height, insulation, and climate. Use this before sizing an air conditioner, heat pump, or furnace. |