Calculate insulation batts or rolls needed for walls, attic, or crawl space based on your target R-value and area.
🌡️ Insulation Calculator
Total Area (sq ft)
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Blow-In Bags
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Batt Rolls
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💡 Pro Tip
Always air seal before insulating. Even high-R insulation loses effectiveness if air can bypass it through gaps around pipes, wires, and electrical boxes.
Frequently Asked Questions
Q: What R-value do I need for my attic?
Most climate zones require R-38 to R-60 for attic insulation. Warmer zones like the South may only need R-30.
Q: How much does insulation cost?
Fiberglass batts cost $0.30–$0.60 per sq ft for materials only. Spray foam costs $1–$2 per sq ft for materials.
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