Free Insulation Calculator | How Much Insulation Do I Need?
Calculate the exact amount of insulation material needed for your walls, attic, floors, and ceilings. Determine R-values, material quantities, and estimated costs for your construction or renovation project.
Area Type & Dimensions
Openings (Windows & Doors)
Insulation Type & R-Value
Calculation Results
Insulation Guide & Tips
Understanding R-Values
R-value measures thermal resistance - higher numbers mean better insulation. Climate zones determine recommended R-values: colder climates need higher R-values for walls, attics, and floors.
Choosing Insulation Type
Fiberglass batts are cost-effective for standard framing. Spray foam provides air sealing. Rigid foam offers high R-value per inch. Consider moisture, fire rating, and installation method.
Installation Tips
Proper installation is crucial - gaps and compression reduce effectiveness. Ensure continuous coverage, seal air leaks first, and maintain ventilation in attics to prevent moisture issues.
Cost Considerations
Factor in material costs, labor (if hiring professionals), and long-term energy savings. Higher initial investment often pays off through reduced heating and cooling costs over time.