Insulation Calculators
Size insulation depth and bags from area and R-values, with climate-zone attic tips. Blown-in, cellulose (incl. dense-pack), attic ruler-to-R, attic cost, and spray foam board-foot tools are live.
Cost calculators
- Attic Insulation Cost CalculatorEstimate attic insulation cost with installed product ranges plus air sealing, baffles, hatch dam, and removal. Free US low / typical / high planner.
- Spray Foam Insulation Cost CalculatorEstimate spray foam cost from board feet — open-cell vs closed-cell, thickness, and optional ignition barrier. Free US low / typical / high planner.
Quantity calculators
- Attic Insulation CalculatorConvert measured attic insulation depth to R-value, then size inches and bags to reach your climate target. Free US ruler-first planning tool.
- Blown In Insulation CalculatorCalculate blown-in insulation bags from attic area and R-value — fiberglass vs cellulose bag charts with settled thickness. Free US planning tool.
- Insulation CalculatorCalculate insulation inches and bags from area, existing R-value, and target R — with DOE climate-zone attic tips by US state. Free planning tool.
- Cellulose Insulation CalculatorCalculate cellulose insulation bags for open attics or dense-pack walls — settled coverage by R or cavity volume × density. Free US planning tool.