Fiberglass Insulation Calculator
Calculate fiberglass insulation batts, rolls, and materials needed for your project. Estimate costs and insulation requirements for walls, ceilings, and attics.
Step 1: Area Dimensions
Insulation Coverage
Standard fiberglass batts: 15″ or 23″ wide x various lengths. Rolls: 15″ or 23″ wide x 25-75 ft long. Coverage per package varies by R-value and thickness.
Step 2: Insulation Specifications
R-Value Recommendations
Attics: R-30 to R-60. Walls: R-13 to R-21. Floors: R-25 to R-30. Check local building codes for specific requirements.
Insulation Materials Estimate
Total Estimated Cost
Complete Insulation Materials List
| Material | Quantity | Unit Price | Total Cost | Notes |
|---|
Estimated Energy Savings
Insulation Calculation Formula
Packages = (Total Area ÷ Coverage per Package) × (1 + Waste%)
Calculate total insulation area, divide by coverage per package, then add 10-15% waste factor for cutting and fitting around obstacles.
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