Flooring Calculator
Calculate floor area, waste allowance, and exact packs of laminate, LVT, or wood flooring needed.
Floor area is 20.00 m²; with 10% waste that's 22.00 m². At 2.20 m² per pack, you need 10 packs.
Results update as you type. The pack count rounds up because partial packs aren't sold; modest leftover stock is useful for future repairs.
Formula
Floor area is the simple multiplication
length × width. Add a waste allowance:
area × (1 + waste% / 100). Divide by the
pack's coverage and round up — partial packs don't sell, and a small surplus is invaluable
for future repairs.
When this calculator is useful
Getting the order right the first time saves a second trip to the builders' merchant and the risk of a mismatched batch. Reach for this calculator at the point of ordering: you have measured the room in metres, you have the pack coverage from the label in square metres, and you want the precise number of packs of laminate, click-LVT or engineered wood to buy. It takes your length and width, gives the floor area in square metres, adds a waste allowance for cuts, and divides by one pack's coverage — rounded up, because partial packs are not sold.
It covers the questions savers and renovators across the euro area ask before they commit: will nine packs cover the bedroom, or do I need ten; how much extra for a herringbone lay; is a spare pack worth keeping for repairs. Because the waste percentage is yours to set, you can keep the order tight for a plain rectangular room or allow more for one with alcoves and pattern-matched planks.
Understanding your result
The calculator returns two areas and a pack count. The first is the plain floor — length times width in square metres. The second is that area plus your waste allowance, and it is the figure that decides the order, because each cut leaves an offcut you generally cannot reuse. The pack count is the area-with-waste divided by the coverage of a single pack, always rounded up to the next whole pack.
If the result sits just above a round number — for instance 9.1 packs, rounded to 10 — you will keep most of a pack in reserve, which is sensible repair stock. Leave it sealed so it stays matched to the batch. If the figure falls well short of the next pack, you have a comfortable buffer. Read the pack count as the minimum to buy rather than a figure to cut back.
A worked example
Consider a rectangular bedroom of 4 metres by 5 metres, giving a floor area of 20 m². Laying engineered wood square in a tidy room, you apply the usual 10% waste, which raises the figure to 22 m². If each pack covers 2.2 m², dividing 22 by 2.2 gives exactly 10 packs to order. Change the plan to a herringbone lay and raise the waste to 15%: 20 m² becomes 23 m², which at 2.2 m² per pack is 10.45 packs, rounded up to 11 — one more pack to absorb the extra cutting that a patterned layout demands.
Points to be careful about
Across the euro area, most shortfalls come from skipping the waste allowance or treating an uneven room as a perfect rectangle.
- Omitting the 5–10% waste, then running short on the final row and having to reorder, possibly from another batch.
- Overlooking plank direction — a diagonal or herringbone layout produces far more offcuts than a straight, square lay and needs a larger allowance.
- Missing alcoves, bay windows and doorway thresholds, which add area and awkward cuts the plain length-by-width ignores.
- Buying packs from two different production batches on separate visits — laminate and wood colour drift between runs, and a mismatched batch can show in daylight.
Euro-area buying notes
Flooring across the euro area is sold by the pack with coverage stated on the box in square metres, and that label is the figure to trust over the 'nominal' number on a manufacturer's website. Floating floors — laminate, click-LVT and engineered wood — usually need an acoustic underlay (Trittschalldämmung, sous-couche) bought separately and worked out from the same m² figure, unless the product has it integrated. Skirting, scotia and threshold profiles are priced by the linear metre, so measure the room perimeter and doorways for those rather than reusing the area figure.
Adding one sealed spare pack to most orders is worthwhile. Many retailers across the euro area refund unopened packs but not opened ones, so the spare carries little risk — and because batches vary slightly in colour, a reserve pack from the same run keeps any future repair an exact match rather than an obvious patch.
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Frequently asked questions
How much waste to allow?▾
10% covers a typical rectangular room with square-laid laminate or LVT. Increase to 12–15% for: diagonal or herringbone patterns, strong pattern matching, rooms with alcoves and bay windows, and tile flooring (where breakage during cutting is more common). The waste covers offcuts that can't be reused — the leftover doesn't go back in the box.
Where is pack coverage shown?▾
On the box, usually in m². Typical figures: laminate ~2.0–2.5 m²/pack, LVT ~2.6–3.5 m², engineered wood ~1.6–2.4 m², ceramic tile boxes ~0.9–1.5 m². Manufacturer websites often quote 'nominal' figures; the box label is the authoritative one. Pack coverage varies by plank size — wider planks usually mean fewer planks per pack.
Do I need underlay (Trittschalldämmung / sous-couche)?▾
For floating floors (laminate, click-LVT, engineered) — yes, separately. It's sold by the roll, calculated from the same m² figure. Some click-LVT and laminate products have integrated underlay; check the box. Real-wood nailed-down installations don't need acoustic underlay but typically use a moisture barrier.
Should I buy a spare pack?▾
Strongly recommended. Production batches differ slightly in colour, especially for laminate. A sealed spare pack from the same batch is worth its price for repairs over the next 5–10 years. Most retailers refund unopened packs; the downside is small.
What about transitions and skirting?▾
Calculated separately, by the linear metre. Measure: doorways for transition profiles; the room perimeter (minus doorway widths) for skirting boards / scotia. Add 5–10% waste to those linear-metre figures too — corners and obstacles cause cutting losses.
Does this work for tiles?▾
Yes. Use the box coverage from the tile manufacturer (often 1–1.5 m² per box for floor tiles) and bump waste to 15–20% to cover breakage and pattern matching.