Laminate Flooring Calculator
Last updated
Room and flooring
Printed on the box.
Boxes to buy
11 boxes
- Floor area
- 180 sq ft
- With 10% waste
- 198 sq ft
- Boxes cover
- 215.9 sq ft
- Planks (approx.)
- 75
- Underlayment rolls
- 2
- Trim / quarter round
- 51 ft (7 × 8 ft)
Buy every box from the same production lot so the colour matches, and keep one spare.
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Laminate boxes by room size
| Room | Area | With 10% waste | Boxes (19.63 sq ft) |
|---|---|---|---|
| 10 × 10 ft | 100 sq ft | 110 sq ft | 6 |
| 12 × 12 ft | 144 sq ft | 158.4 sq ft | 9 |
| 15 × 12 ft | 180 sq ft | 198 sq ft | 11 |
| 20 × 15 ft | 300 sq ft | 330 sq ft | 17 |
| 24 × 16 ft | 384 sq ft | 422.4 sq ft | 22 |
Tools the pros use for this job
Laminate Underlayment
Laminate Underlayment
Cushions, quiets and blocks moisture under floating laminate.
Check price on AmazonCushions, quiets and blocks moisture under floating laminate.
Installation Kit
Installation Kit
Tapping block, pull bar and spacers for tight, gap-free joints.
Check price on AmazonTapping block, pull bar and spacers for tight, gap-free joints.
Laminate Cutter
Dust-free straight cuts without a saw.
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Prices as of Oct 11, 2026, 4:39 AM UTC. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
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How this calculator works
Boxes = room area × (1 + waste) ÷ box coverage, rounded up. Planks = the same area ÷ the area of one plank (width × length ÷ 144). Underlayment covers the room itself, without the cutting waste, and trim (quarter round or baseboard) runs the room perimeter minus about 3 ft for each doorway.
Waste depends on the layout. A straight run in a plain rectangular room wastes about 5–8%, because the offcut from one row starts the next. Closets, hallways and random end joints push it to 10%, a diagonal layout to 15%, and herringbone to 20%.
- Leave an expansion gap at every wall, usually about 1/4 in (6 mm); the trim covers it. Check the maker's instructions.
- Let the boxes acclimate in the room for the time the maker specifies, often 48 hours, before you open them.
- Keep one spare box for repairs; the same colour batch can be impossible to find later.
Comparing floors? Try the vinyl plank calculator, the hardwood flooring calculator or the carpet calculator.
Frequently asked questions
How many boxes of laminate flooring do I need?
Multiply the room's length by its width, add 10% for waste, and divide by the square feet on the box. A 15 × 12 ft room is 180 sq ft, 198 sq ft with waste, so 11 boxes at 19.63 sq ft each.
How much extra laminate should I buy?
About 7% for a simple rectangular room, 10% with closets or a random stagger, 15% for a diagonal layout and 20% for herringbone.
How many square feet are in a box of laminate?
Usually 15 to 25 sq ft (about 1.4 to 2.3 m²), depending on the thickness and plank size. Thicker 12 mm laminate has less per box. Use the figure printed on the box you are buying.
Do I need underlayment under laminate?
Floating laminate needs a foam or felt underlayment unless it has one attached. Over concrete, use one with a vapour barrier. A roll usually covers 100 sq ft.
How do I calculate laminate in square metres?
Switch the units to metres. A 4.5 × 3.6 m room is 16.2 m², 17.8 m² with 10% waste, which is 10 boxes of 1.82 m².
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Guides worth reading next
- How to Measure a Room for Tile (Step by Step)Measure any room for floor or wall tile: handle closets and alcoves, convert inches to decimals, subtract fixtures, and add the right waste percentage.
- Choosing the Right Tile Size for Your RoomHow tile size changes a room: when 12×24 beats 4×4, why small rooms can take large tile, grout line math, and the flatness rule for big formats.
- Sanded vs Unsanded vs Epoxy Grout: Which One Do You Need?Grout types explained by joint width and location: when sand scratches tile, why epoxy wins in showers, and how much of each type a bag actually covers.