How much laminate flooring do I need? m², packs and the full shopping list

To work out how much laminate flooring you need: multiply the room's length by its width in metres, add a waste allowance for your laying pattern, then divide by the coverage printed on the pack and round up. For a typical 4 × 5 m living room with a straight lay, that is 20 m² (about 215 sq ft) × 1.08 = 21.6 m², which at 2.22 m² (about 24 sq ft) per pack means 10 packs (sold as boxes in the US). The waste percentage is the only number in that chain you have to judge rather than measure, and it ranges from 5% for a simple rectangle to 20% for herringbone.

How do you measure the room for laminate?

Measure in metres at floor level, because skirting makes walls look straighter than they are. Length × width covers a rectangular room; anything more complicated splits into rectangles that you add up, with alcoves and bay windows measured separately. Measure to the front of fitted kitchen units and wardrobes rather than the wall behind them, since a floating floor stops at the plinth line anyway. The measuring guide works through L-shapes, chimney breasts and rooms that refuse to be rectangles.

What waste percentage should you allow?

The pattern decides it, and the room shape nudges it up or down within the range:

Narrow spaces such as hallways sit at the top of their band, because short offcuts from a 1 m (about 3.3 ft) wide run are often too short to start the next row. The reasoning behind each band is in the waste percentage guide, and whether the folk-wisdom flat 10% actually covers you is tested room by room in the 10% rule audit.

How do you turn square metres into packs?

Divide the area including waste by the pack coverage, then round up. Coverage is printed on the pack label, usually between 1.5 and 2.6 m² (16 to 28 sq ft), so never assume an average. Worked examples for common room sizes, including the awkward cases where the answer sits right on a pack boundary, are in how many packs of laminate do I need. The laminate calculator does the whole chain for your own measurements, and if you want the exact answer rather than a percentage estimate, the floor planner lays every board in your real room shape and counts the actual cuts and offcuts.

What else goes on the laminate shopping list?

The boards are the biggest line but not the whole list, and first-time budgets go wrong on the extras more often than on the packs:

• Underlay: the same m² as the floor plus about 5% for trimming. Which type depends on the subfloor, covered in the underlay guide.
• Vapour barrier: required over concrete or screed, either built into the underlay or as a separate membrane beneath it.
• Scotia or beading: the room's perimeter in metres, if the existing skirting stays on and the expansion gap needs covering.
• Threshold bars: one per doorway where the floor breaks or meets a different floor.
• Sundries: spacers, tapping block and pull bar if you do not own them, and tape for the underlay seams.

How much extra should you buy?

The waste allowance covers cutting, so resist the urge to pad it again. What it does not cover is the future: keep 2 or 3 boards after the job as spares, because a damaged board three years in is easy to swap and nearly impossible to match once the decor is discontinued. Buy the full quantity in one order too, since laminate colour drifts between production batches, and a top-up pack bought weeks later can arrive a visibly different shade. Both habits, and the eight other ways laminate jobs go wrong, are in the common mistakes guide. For what the total ends up costing once underlay, trims and fitting are counted, see the broader how much flooring do I need pillar and the installation cost guide.