MetraNestCount faces and layers
Measure one rectangular face, then deduct openings where there will actually be no cladding. The number of layers multiplies this area. Two equally sized faces with one layer each therefore represent two identical areas; one face with two layers gives the same geometric quantity. If the faces differ, calculate them separately.
Understand the limits of an area-based calculation
A sheet covers its length multiplied by its width. Rounding up gives a theoretical count after your allowance. It assumes the available area can be used efficiently enough. A door, a narrow strip or a joint requirement may make offcuts unusable and increase the actual number. A cutting plan is still needed to finalise the purchase.
Keep construction system design separate
The number of layers is a project input, not a recommendation. The sheet type, framing, fixings and expected performance are not derived from this result. In particular, a correct quantity does not validate strength, acoustics, fire protection or suitability for a damp room.
Total area = (width × height − openings) × number of layers. Sheets = total area × (1 + allowance ÷ 100) ÷ area per sheet, rounded up.
A face four metres wide
A 4 × 2.5 m face with 2 m² of openings gives a net area of 8 m². One layer and a 10% allowance bring it to 8.8 m². Sheets measuring 2.5 × 1.2 m each cover 3 m²: three sheets are the area-based estimate, to be checked against the cuts.
Details to check
- Count each face and each layer only once.
- Keep different surfaces separate.
- Check the cutting plan before confirming the order.
Frequently asked questions
Should a small opening always be deducted?
A geometric deduction does not guarantee a saving in sheets. Check whether the offcut can actually be reused in your plan.
Is the sheet count enough to order a complete partition?
No. The calculation does not include framing, insulation, screws or jointing products.
Method and references · Editorial review: 25 October 2026
The geometric formulas are explained here. For a product, its packaging dimensions and coverage rate remain the reference inputs.