Free insulation calculator for homeowners and contractors. Enter your dimensions to instantly calculate how much insulation you need, required thickness, and estimated costs. Covers blown-in, spray foam, fiberglass, cellulose, batt, and roll insulation. Compare materials side by side, see R-value recommendations, and get DIY vs professional cost breakdowns. No signup required.
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Maker
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Hi everyone! I built this free insulation calculator because I noticed most homeowners struggle to figure out how much insulation they actually need. Existing tools online are either too basic or try to sell you something. This calculator covers blown-in, spray foam, fiberglass, and more — with honest cost estimates and R-value guidance. I'd love to hear your feedback!