Insulation Calculator
Estimate insulation area and the number of packs required for a rectangular surface.
How to Use the Insulation Calculator
Enter the area to insulate and the coverage per pack to estimate how many insulation packs are required.
Practical Example
If a project covers 120 m² and each pack covers 10 m², the basic estimate is 12 packs before allowing for cuts or waste.
Factors That Affect the Result
Stud spacing, cavity size, insulation thickness, offcuts, compression, openings and package coverage can change the final quantity.
Frequently Asked Questions
Should I add waste?
Yes. A small allowance helps cover cuts and damaged material.
Does insulation thickness matter?
Yes. Use the product that matches the required thermal performance and cavity depth.
Can I use this for ceilings?
Yes, using the ceiling area and the selected product coverage.
Related Tools
Insulation Estimation Tips
Measure the total area to be insulated and use the package coverage for the insulation product you plan to buy. Stud spacing, cavity depth, attic layout and obstructions can affect the real quantity required. Batts and rolls may create offcuts, while blown insulation is usually specified by both coverage area and target depth. Add a small allowance for waste and difficult sections, and confirm the required R-value for your climate and local building code before purchasing material.