Calculate insulation materials needed based on area and R-value
Our insulation calculator helps you determine the amount of insulation material needed for your walls, attic, or crawl space based on the area to be covered and desired R-value. Whether you're insulating a new construction project or upgrading existing insulation for better energy efficiency, this tool provides accurate material estimates.
Proper insulation is one of the most cost-effective ways to improve your home's energy efficiency and comfort. The R-value indicates the insulation's thermal resistance - higher R-values provide better insulation. Requirements vary by climate zone and application: attics typically need R-38 to R-60, walls R-13 to R-23, and floors R-25 to R-30.
This calculator is ideal for DIYers planning attic insulation projects, homeowners upgrading wall insulation, contractors estimating material costs, and anyone asking "how much insulation do I need for my attic?" or "what R-value do I need for my climate zone?"
Follow these steps to calculate your insulation needs: