How this insulation calculator works
The surface area is increased by the waste allowance and divided by the square-foot coverage printed on the insulation package.
How to use it
- Area to insulate. Enter the value in sq ft.
- Coverage per package. Enter the value in sq ft.
- Waste allowance. Enter the value in %.
- Request the result. Add your email, then select “Email & show my result.”
What to do with the number
Coverage differs by product thickness, width and R-value, so package labels are the authoritative input. Measure walls, ceilings and floors separately when they will use different insulation products.
Planning estimate
Use this result as a starting point, not a guarantee. Product specifications, site conditions, manufacturer guidance, local codes, taxes, labor, tolerances, and rounding can change the real requirement or cost.