Insulation R-Value Calculator
Calculate recommended R-value, material, and cost by climate zone.
Last updated: June 2026
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Attic floor area, wall area, or floor area in square feet.
Recommended Insulation
Recommended R-ValueR-49
Material typeBlown-in Cellulose
Inches needed14"
Batts / Bags needed25 batts or 25 bags
Material cost$1,000 - $2,000
Labor cost$500 - $1,500
Total installed costMaterial + labor
$1,500 - $3,500
Based on: 1000 sq ft in Zone 5, Attic / Ceiling. R-value from DOE/IRC 2024. Prices from HomeAdvisor 2026 data.
Disclaimer: These estimates are for budgeting purposes only. Actual costs depend on your location, current material prices, and contractor rates. Always get 2-3 quotes from licensed contractors before starting any project.