Insulation
Calculators.
Free precision tools — no signup.
5 Tools
Insulation R-Value Calculator
Calculate insulation R-value requirements by IECC climate zone with material quantities, thickness, cost, and energy payback
Blown-In Insulation Calculator
Calculate blown-in cellulose or fiberglass insulation bags needed for attic or walls by R-value target and square footage
Spray Foam Insulation Calculator
Calculate spray foam board-feet, depth, DIY kit count, and professional cost for open-cell or closed-cell foam by R-value target
Vapor Barrier Calculator
Calculate vapor barrier square footage, rolls needed, and IRC code compliance for crawl spaces, basements, and slabs by climate zone
Energy Savings Estimator
Estimate annual energy savings and payback period for insulation upgrades, window replacements, and air sealing by climate zone and fuel type