Insulation Calculator
Estimate insulation packages for walls, ceilings or floors from net area and package coverage.
Project details
Estimate
Area incl. waste—
Packages to buy—
Planning estimate only. Confirm product dimensions, package coverage and project requirements before purchasing.
How insulation quantity is estimated
Net surface area is increased by waste and divided by the coverage printed on the package.
packages = area × (1 + waste %) ÷ package coverage
R-value, cavity depth and code requirements are separate from quantity.
Insulation Calculator FAQ
Does this choose the correct R-value?
No. Select insulation performance based on applicable project requirements.
Should I subtract windows and doors?
Use net area if those openings will not receive insulation.
Why use package coverage?
Coverage varies by product and packaging.