Rigid insulation boards calculator
Estimate rigid boards from the area to cover.
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Your measurements
Enter your project values. Your estimate updates as you type.
View your estimateExample values are a starting point. Check product yields and specifications before ordering.
YOUR ESTIMATE
Sheets to buy
10
Net area24 m²
Area with waste26.4 m²
Area per sheet2.88 m²
Whole quantities are rounded up.
How it's calculated
Sheets = (area − openings) × (1 + waste ÷ 100) ÷ (sheet length × sheet width), rounded up.
Calculations use consistent units for your selected measurements. The waste allowance is applied once to the measured requirement. Whole purchase quantities are rounded up.
What this estimate includes
Subtract excluded areas. This estimates coverage, not thermal compliance or fastening requirements.
Quantity and arithmetic estimates only. Use project specifications for installation and design requirements.
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