Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Construction
Insulation R-Value Calculator
Compute the total thermal resistance (R-value) of an insulation layer from its thickness and material-specific R-value per inch. Useful for meeting energy-code targets in walls, attics, basements, and floors.
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
| Insulation R-Value Calculator | HVAC Load Calculator | |
|---|---|---|
| Category | Construction | Construction |
| Inputs required | 2 | 5 |
| Result | Total R-Value (R) | Required BTU/Hour (BTU/hr) |
| What it does | Compute the total thermal resistance (R-value) of an insulation layer from its thickness and material-specific R-value per inch. Useful for meeting energy-code targets in walls, attics, basements, and floors. | 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. |