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› Insulation Calculator
🏗 Insulation Calculator
Calculate insulation needed for walls, attics, and floors. Free online tool, no registration.
Area (sq ft)
Desired R-Value
R-13 (2x4 wall)
R-19 (2x6 wall)
R-30 (attic floor)
R-38 (attic floor)
R-49 (ceiling)
R-60 (cold climate ceiling)
Insulation Type
Fiberglass Batts
Blown-In Cellulose
Blown-In Fiberglass
Spray Foam (open cell)
Spray Foam (closed cell)
Calculate