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Roll and Batt Insulation Calculator
Input the length and width of the area you’re insulating. Click the button to calculate the amount of insulation in square feet and work hours (for wall and ceiling fiberglass insulation) necessary for this job.
This calculator is to be used as an estimating tool only.
Finding Your R-Value
Once you have an estimate of the square footage of roll insulation or batt insulation you need, determine the necessary R-value for the area of your home you need to insulate. Insulation with a higher R-value is typically thicker or denser, providing more resistance to heat flow.
The United States Department of Energy provides recommendations to help you determine the right R-values depending on where you live in the US. Match your location on the map to the chart. Here’s what you need to know:
- You should always check R-values against building codes.
- Manufacturers indicate insulation R-values clearly on the packaging.
- Higher R-values in the chart indicate areas that need more protection against heat flow.
- Attic insulation typically needs a higher R-value than other areas.
- Cooler climates in general need higher R-values
- R-values are cumulative. If you have roll or batt insulation in place, you can typically improve comfort and efficiency by adding a layer to reach the recommended R-value.
Once you know the R-value you need, shop for insulation for your space:
- Wall insulation
- Attic insulation
- Ceiling insulation
- Basement insulation
- Crawlspace insulation
- Floor insulation
Other insulation types include: