Parquet Laminate Calculator | How Many Packs?
Parquet and laminate calculator: net area from room size, waste, packs and planks, underlay, vapour barrier and skirting length. Free tool.
How is parquet and laminate calculated?
Quantity depends on net floor area and the pack coverage on the box (m²). For a rectangular room, area = length × width. Uncovered areas are subtracted and recesses are added. Waste covers cutting and stagger; packs, planks, rolls and skirting boards round up.
Steps
- Enter room length and width. If several identical rooms share the size, enter the room count.
- Subtract uncovered areas such as islands or fixed cabinets; add recesses as extra area.
- Choose product type (laminate, engineered, solid) and layout; waste and pack coverage fill in. Override with the m² on the label if different.
- Enter underlay roll coverage and optional vapour-barrier roll coverage.
- For skirting, enter door gaps and one board length. Optional prices estimate material cost.
Formula
- Net area: Length × width × rooms − uncovered + extra
- Order area with waste: Net area × (1 + waste % / 100)
- Packs: round up(order area ÷ pack m²)
- Planks: round up(order area ÷ (plank width × plank length))
- Skirting: 2 × (length + width) × rooms − door gaps; boards after waste
Pack coverage comes from the product label (often 1.8–2.5 m²). Underlay and vapour barrier round from the net floor area. In area mode, enter perimeter (m) for skirting.
Common pack coverages
Type the m² printed on the box before you buy. The ranges below are a guide.
| Product | Pack (m²) | Suggested waste |
|---|---|---|
| Laminate | ≈ 2.0 – 2.5 | 8 – 10% |
| Engineered / lam parquet | ≈ 1.8 – 2.2 | 10 – 12% |
| Solid parquet | ≈ 1.5 – 2.0 | 12 – 15% |
Waste by layout
Pattern and stagger increase cutting waste. Choosing a layout fills waste; override for special rooms.
| Layout | Waste | Note |
|---|---|---|
| Straight / parallel | 7 – 8% | Low-cut, regular rooms |
| Staggered | 10% | Standard interior install |
| Diagonal | 12 – 15% | More edge cutting |
| Herringbone | 15 – 20% | High-cut pattern |
Practical tips
- Always enter pack coverage from the label; boxes differ even within one brand.
- Raise waste by 2–3% for L-shaped or heavily broken-up rooms.
- Underlay is usually required under laminate; add a vapour barrier on damp screed.
- Skirting uses rectangular perimeter minus door gaps; inside/outside corner cuts are extra.
- For the same product across rooms, increase room count or switch to area mode with a summed floor area.
Site note
The result is a purchase estimate. Lay direction, pattern, columns and thresholds change real waste. Confirm the order against the manufacturer sheet and site measure.
Related calculators
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Frequently asked questions
How many square metres are in one pack of flooring?
Laminate packs are often 2.0–2.5 m². Engineered and solid parquet are often 1.5–2.2 m². The box label is the figure to use. This tool opens at 2.2 m² for laminate.
How many packs does a room need?
Net area = length × width − uncovered + extra. Order area = net × (1 + waste%). Packs = round up(order area ÷ pack m²). A 5×4 m room with 10% waste and a 2.2 m² pack needs 22 ÷ 2.2 = 10 packs.
How much waste should I allow?
Straight lays often use 7–8%, stagger about 10%, diagonal 12–15%, and herringbone 15–20%. Raise the allowance in narrow corridors and L-plans.
How are underlay and vapour barrier calculated?
Both divide the net floor area by roll coverage and round up. A vapour barrier is useful on damp screed or ground floors.
How is skirting length calculated?
For a rectangle, perimeter = 2 × (length + width). Door gaps are subtracted, waste is added, and the result is divided by one board length and rounded up. Corner cuts are not included.
Is laminate calculated differently from solid parquet?
The formula is the same. Pack m², plank size and suggested waste differ. Choosing a product type fills those defaults.
Is the result a final order quantity?
No. Pattern, lay direction and site detail change waste. Entering pack coverage from the label brings the estimate closer.