Multiply insulation panel dimensions by pieces per pack to obtain pack coverage, then round the allowance-adjusted area to whole packs. This estimates quantity only. Thermal performance, vapor control, moisture, fire behavior, compression and safe installation conditions must be checked for the complete building assembly.
Worked reference example
Illustrative inputs in metres and SI units; the price is an example entered by the user, not a market quotation. Numeric reference verified by the automated test suite.
- Length
- 4
- Width
- 3
- Area deductions (trim tool: length)
- 0
- Panel length
- 2.44
- Panel width
- 1.22
- Pieces per pack
- 10
- Allowance
- 10
- Price per purchase unit
- 2
- Result
- 1
- Cost (example currency units)
- 2
Calculation method
N = ceil(A × (1 + r / 100) / (Wₛ × Hₛ × nₚ))Measure. Calculate. Build.
- Use actual dimensions and split complex rooms into rectangles.
- Allow for cuts, joints and package sizes. Compare stock formats.
- Combine your results in a shopping list you can save and print.
Sources & limits
Planning estimates; verify measurements and product data before purchasing.
Prices are supplied by you. Area estimates do not establish a feasible cutting arrangement. These tools do not assess structural loads or issue construction approvals.