Measure each room, add the right allowance for cuts, and round up to whole packs. Use the calculator below, then send us the figure for a written quote.
Short answer: Measure each room's length and width in metres, multiply to get the area, add them together, then add 10% for straight-lay planks or 15% for herringbone and chevron to cover cuts. Round up to whole packs and keep a few spare boards from the same batch for future repairs. Updated October 2026 by the LIGNORA flooring team
Enter each room or area in metres.
Round up to whole packs, and keep a few spare boards from the same batch for future repairs. Send us this figure for a written quote →
A tape measure and five minutes per room.
Measure the length and width of each room at its widest points, in metres, and multiply them to get the area in m². Split L-shaped rooms and open-plan spaces into rectangles and add them together.
Include alcoves, bay windows, the space under radiators and the floor through each doorway up to the threshold. Ask your fitter whether the floor will run under kitchen units — most floors stop at the plinth line.
Why you always order more than the floor area.
Every floor loses some boards to cuts at walls, doorways and pipes. We allow 10% extra for plank floors and 15% for herringbone and chevron, where every block at the edge of the room is cut to the pattern.
Small or awkward rooms can need a little more; large, simple rooms a little less. Always round up to whole packs, and keep a few spare boards from the same batch — colour varies between batches, so they are the best match for any future repair.
Written by the LIGNORA team. Our in-house fitters have over 11 years’ experience laying engineered oak, parquet and solid wood floors, and this guide reflects how we specify floors on real projects. Last reviewed October 2026.
A few floors from the range. Each has its own page with the full specification, a spec sheet and a free sample posted to you.






Send us a photo of the room and tell us about the subfloor and heating, and we will recommend the right board. Or order free samples to see them at home.
