Calculator
Insulation Calculator
Fiberglass batt, blown-in cellulose, and spray foam by square foot.
Calculate Insulation
You need
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square foot
- Area
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- With 10% overage
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- Estimated cost (US avg)
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How this calculator works
Enter your shape and dimensions in feet. The calculator multiplies them out and converts to square foot, then adds 10% overage for waste — the industry standard for insulation.
Cost shown is a US national average ($1.2 per square foot). Regional pricing pages are coming soon.