Laminate Flooring Calculator

How many boxes of flooring do I need?

Divide your floor area plus the chosen cutting allowance by the coverage of one box, then round up to a whole box. Box and pack mean the same thing here. Use the coverage of the entire box, not the area of one plank.

A 12 ft by 15 ft room has 180 square feet of floor. With an example 8% allowance, the installation requirement is 194.4 sq ft. If each box covers 20 sq ft, 194.4 ÷ 20 = 9.72, so buy 10 boxes for installation. An optional extra repair box would make 11; it is added separately.

Switch to Imperial before entering feet and square feet. The 10-box order contains 200 sq ft: 14.4 sq ft of chosen cutting allowance and 5.6 sq ft from rounding, above the 180 sq ft floor. Neither amount is a promise of intact spare boards after cutting.

How to measure for laminate flooring

Do not start with a previous rounded box coverage or add a cutting percentage to your measurements first. The calculator applies the selected allowance once. Keep your measurement sketch so you can change products without measuring again.

1. Sketch the boundary to be floored, including relevant alcoves and doorway areas. Check where the chosen flooring system should finish at fixed units and transitions.
2. Measure length and width in one unit. For a rectangular room, multiply them. Measure opposite sides too; a noticeably out-of-square room needs a layout check beyond one rectangle.
3. For an L-shape, mark two rectangles that meet without overlapping. Use the calculator’s 2 or 3 rectangular areas option and enter each pair of dimensions. A third rectangle is optional: leave both of its dimensions at 0 when unused.
4. For more than three sections or another shape, use the area calculator, add the areas and choose the known-total-area option here.
5. Copy the coverage from the selected flooring box. Choose a cutting allowance from the layout and product instructions, then decide whether to keep unopened repair packs separately.

Ordering for several rooms or an L-shaped floor

A 4 m × 3 m rectangle plus a separate 2 m × 2 m extension gives 12 + 4 = 16 m². In the multi-area option, enter those dimensions as areas 1 and 2. Set area 3 to 0 × 0. With a selected 12% allowance and 2.22 m² boxes, the installation requirement is 17.92 m² and the order is 9 boxes, covering 19.98 m².

The same inputs ordered separately would need 7 boxes for the 12 m² section and 3 for the 4 m² section: 10 boxes altogether. Pooling before rounding saves one box in this numerical example. It assumes the same product and an allowance appropriate to both areas; it does not prove that cuts and offcuts work across a real layout.

Calculate different flooring products separately. If rooms need different allowances, calculate their unrounded requirements separately before combining an order. Check the product instructions for transitions and expansion breaks between rooms. Measure underlay and skirting separately because their quantities use different coverage and cutting rules.

How much laminate flooring do I need?

Start with the floor area, add a cutting allowance, then divide by the coverage printed on the pack and round up. The rounding matters: a room needing 20.4 m² with 2.22 m² packs takes 10 packs, giving you 22.2 m²: you cannot buy a fraction of a pack.

Measure into doorways and any alcove or bay, because you will be flooring those too. For an L-shaped room, split it into rectangles and add the areas.

The formula

In multi-area mode, combined floor area is length 1 × width 1 + length 2 × width 2 + the optional length 3 × width 3. Round the installation quantity once, after combining the areas and applying the allowance. Repair packs are added as whole packs after that rounding.

How much waste to allow

These are comparisons, not recommended waste rates for particular patterns. The useful allowance depends on board dimensions, direction, room shape, cut reuse and the installation instructions. The tool estimates total quantities; it does not lay out every board or determine which offcuts can be reused.

Worked example

A 5 m × 4 m living room = 20 m². With an 8% allowance that is 21.6 m². Packs cover 2.22 m² each, so 21.6 ÷ 2.22 = 9.73 → 10 installation packs, covering 22.2 m². The 2.2 m² above the measured floor consists of 1.6 m² cutting allowance and 0.6 m² added by pack rounding.

If you choose one extra unopened repair pack, the total becomes 11 packs / 24.42 m². The extra 2.22 m² is a separately purchased reserve, rather than a guess about what will remain after fitting. Keep that pack aside if you want it available for repairs; suitability for a later repair depends on the flooring and its condition.

What else the job needs

• Underlay: confirm whether it is required and permitted, including any pad already attached to the boards. Use its actual coverage in the underlay calculator.
• Moisture-control layer: check the subfloor and flooring instructions for the required membrane, joints and edge treatment.
• Beading or skirting around the perimeter to hide the expansion gap: see the skirting board calculator.
• Transitions and pipe details: count these individually according to the layout and product instructions.

Getting the last row right

Plan the first and last rows using the minimum edge widths and joint staggering in the instructions for your exact floor. For example, Quick-Step’s installation guide explains row planning for its system. Its specifications are not universal limits for other products.

Optional plank dimensions give an approximate board count. A one-room estimate also gives a simple row count from room width divided by plank width. It does not calculate perimeter clearances, starter cuts, final-row width or a cutting schedule. In multi-area mode, plan the board layout for each area separately.

Planning your order

Check the inputs before buying: measure the surfaces you need, then apply an allowance and round to whole packs. The guides include worked examples you can follow alongside this calculator.