Overview
Use this calculator when you already know the insulated area and need a buying quantity for EPS boards. It converts area and thickness into insulation volume, then adds an allowance for cuts, edge pieces, and fitting losses so the order is closer to what the job will actually consume. It works for façades, floors, roofs, and foundations, where pack contents can differ from one brand to another. You can check both the claimed coverage and the pack volume so the result matches the exact product on the quote or delivery note.
Use cases
- Façade board orderingWork out the number of EPS packs before sending a wall-insulation order to the supplier.
- Floor build-up planningEstimate boards under screed or slab so the insulation layer fits the floor layout.
- Roof insulation takeoffCheck the material needed for pitched or flat roof insulation before the delivery is booked.
- Foundation perimeter sizingCalculate packs for below-grade and perimeter insulation where many corners and cuts appear.
- Quote comparisonCompare pack counts across products that have different coverage or different pack volumes.
How it works
- 1
Enter the insulated area in square meters.
- 2
Set the EPS thickness in centimeters.
- 3
Fill in the coverage per pack and the pack volume from the product label.
- 4
Add a waste percentage for cuts, trimming, and on-site losses.
- 5
Review the required insulation volume, adjusted area, and rounded pack count.
Examples
Detached house façade
Input: 168 m2 area, 16 cm thickness, 5.0 m2 per pack, 9% waste, 0.80 m3 pack volume
Output: Shows the insulation volume, the waste-adjusted area, and the pack count rounded up.
Useful for ordering EPS boards for an external wall system.
Warehouse floor insulation
Input: 240 m2 area, 12 cm thickness, 4.8 m2 per pack, 6% waste, 0.58 m3 pack volume
Output: Returns the total EPS volume and the estimated number of packs for the floor layer.
Helpful when preparing material before the concrete or screed stage.
Foundation edge strip
Input: 62 m2 area, 10 cm thickness, 3.6 m2 per pack, 12% waste, 0.36 m3 pack volume
Output: Displays the insulation volume and a higher pack count because of the extra cutting allowance.
Fits jobs with many corners, returns, and narrow offcuts.
Flat roof refurbishment
Input: 93 m2 area, 18 cm thickness, 4.2 m2 per pack, 8% waste, 0.76 m3 pack volume
Output: Calculates the volume and the pack total needed for the roof build-up.
Good for checking material before a warm-roof delivery.
FAQ
Why should I enter both pack coverage and pack volume?
Some products are sold by area coverage, others by cubic volume, and the two figures do not always line up perfectly. Entering both lets the calculator reflect the exact pack format from the product sheet.
What happens if my project has many corners or openings?
Add those losses into the waste percentage. The tool uses the area you enter, so openings, returns, and intricate edges should be covered by a larger allowance.
Can I rely on the rounded pack count as the final order?
Use it as the base order quantity, then confirm the board dimensions, joint pattern, and any special details that may increase offcuts or require extra boards.
Which unit mistake causes the biggest error?
Thickness. The calculator expects centimeters, so 12 cm must be entered as 12. Do not enter millimeters or decimal meters.
What if the product label lists both board count and m3 per pack?
Use the values from the same exact product. If the label gives both, the pack count should be consistent with the pack volume and board size shown on that label.