MetraNestFollow the walls concerned
For a rectangular room, the perimeter is twice the length plus twice the width. Then subtract doorways and any areas where no skirting will be fitted. A recess adds wall sections: skirting length cannot be derived from the floor area.
A total length does not guarantee the cuts
Two lengths may contain enough metres overall without providing every wall section in one piece. To finalise the order, list the sections and allocate them to the purchased lengths. This tool estimates from total length; it is not a cutting optimiser.
Think about the reserve too
The entered allowance covers the reserve you choose for cuts and adjustments. Final rounding sometimes adds almost a whole board length. Check this surplus before increasing the order again. If different heights, colours or profiles are used, calculate them separately.
Net length = perimeter − doorways to subtract. Required length = net length × (1 + allowance ÷ 100). Estimated boards = required length ÷ length of one board, rounded up.
A rectangular living room
A 4 × 3 m room has a 14 m perimeter. Subtracting 1.60 m of doorways leaves 12.40 m. With a 10% allowance, the target is 13.64 m: six 2.40 m lengths provide 14.40 m. Then check how the cuts are distributed.
Details to check
- Note each wall length on a sketch.
- Measure the actual doorway widths.
- Make a final check using the available board lengths.
Frequently asked questions
Are six lengths always enough if the calculation says six?
Not necessarily. An awkward arrangement of sections may require an extra board. Check the cutting list before buying.
Should I include the area behind furniture?
Count only the areas included in your project. A movable piece of furniture and a fixed installation do not always call for the same approach.
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.