Insulation Calculator Guide
Estimate insulation rolls, batts, or bags from wall, attic, or floor area.
Measure insulated area
Measure wall, attic, or floor area in square feet. Separate areas with different depth or R-value.
Match product coverage
Insulation package coverage depends on product type, thickness, and R-value.
Account for framing
Stud bays, joists, blocking, and obstructions affect installed material and cuts.
Check code and climate
Recommended R-values vary by climate zone and building part.
FAQ
Can I mix insulation types?
Sometimes, but moisture control and ventilation must be considered.
Should I compress batts?
No. Compression reduces insulation performance.
Does attic insulation need ventilation?
Yes. Do not block required soffit or roof ventilation paths.
Next step
Open the calculators and enter your dimensions to estimate materials before you shop.