🌡️ Free Insulation Calculator

Insulation Calculator

Walls (2×4 framing): R-13 to R-15
Walls (2×6 framing): R-19 to R-21
Attic (most US climates): R-38 to R-60
Floors over crawlspace: R-19 to R-30
Basement walls: R-11 to R-15

Find exactly how many rolls or bags of insulation you need to hit your target R-value.

🌡️ Insulation Calculator

Area to Insulate (sq ft)

Insulation Type

Check EnergyStar.gov for your specific climate zone recommendation.