☁️ Insulation Calculator
Area, target R-value and material
Length
Width
…or area directly
Target R-value
R-13 — walls, mild climates
R-19 — floors, walls in cold areas
R-30 — attics, moderate climates
R-38 — attics, cold climates
R-49 — attics, very cold climates
Insulation type
Blown-in cellulose (bags)
Blown-in fiberglass (bags)
Batts / rolls (packages)
Waste allowance (%)
(extra for cuts, spills and uneven ground — 10% is the usual rule)
Calculate insulation
Calculator by
CalcCoverage
— free DIY & home-improvement calculators