Insulation Board Foot Calculator
Calculate insulation board feet and coverage area for fiberglass batts, rigid foam board, and cellulose. Includes total R-value calculations.
Insulation Calculator
Calculate board feet and coverage area for insulation materials
Fiberglass Insulation
Most common type. R-value typically 3.14 per inch. Available in batts (pre-cut) or rolls. Standard widths: 14.5" (for 16" OC studs) and 22.5" (for 24" OC).
Rigid Foam Board
Higher R-value per inch (R-5 to R-6.5). Common sizes: 4'×8' sheets in 1", 1.5", and 2" thickness. Excellent for continuous insulation applications.
Spray Foam
Highest R-value (R-6 to R-7 per inch for closed-cell). Sold by board foot coverage. One board foot covers 1 sq ft at 1" thick. Expands to fill gaps.
Frequently Asked Questions
How do I calculate insulation coverage?
What R-value do I need?
How many board feet in a spray foam kit?
Specialized Calculators
Choose from our collection of specialized board foot calculators tailored for specific materials and applications
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Calculate insulation board feet and coverage area for fiberglass batts, rigid foam board, and cellulose. Includes total R-value calculations.
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