Flooring Calculator

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Work out how much flooring you need — enter your room size and box coverage to get the total area, waste allowance, number of boxes and estimated cost.

m
m
m²
%
$ m²
Floor area – m²
Area with waste –
Boxes needed –
Boxes are always rounded up. A 10% waste allowance is typical for straight layouts; use 15–20% for diagonal patterns or rooms with many cuts.

About Flooring Calculator

The flooring calculator works out how much laminate, vinyl, hardwood or tile flooring to buy for a room. Enter the room’s length and width in metric or imperial units, the coverage printed on each box and a waste allowance, and it returns the floor area, the area including waste and the number of boxes to order.

Waste is the figure people forget: cuts at walls, doorways and pattern matching consume material beyond the bare floor area. A 10% allowance suits straightforward straight layouts, while diagonal patterns or rooms with many alcoves and cuts warrant 15–20%. Box counts are always rounded up so you never come up one plank short.

Tick the cost option and add the price per square metre or square foot to get an estimated total before you visit the store. The calculator is free and instant, making it easy to compare products with different box coverages.

How to use Flooring Calculator

  1. Choose metric or imperial units.
  2. Enter the room length and width.
  3. Set the coverage per box (printed on the packaging) and your waste allowance.
  4. Optionally enable cost estimating and enter the price per area unit.
  5. Read the floor area, area with waste, boxes needed and estimated cost.

Frequently asked questions

Use about 10% for straight layouts in simple rectangular rooms. Increase it to 15–20% for diagonal installations, herringbone patterns or rooms with many corners, alcoves and doorways that force extra cuts.

Flooring is sold by the full box, so any fraction means buying one more. Rounding up also leaves spare planks for future repairs — worth keeping, since dye lots vary between production runs.

Split the room into two rectangles, run the calculator for each and add the box counts together — or sum the two floor areas and enter them as one equivalent rectangle.

It is printed on the packaging or product page, usually as square metres or square feet per box. Coverage varies by product, which is why the calculator asks rather than assuming a figure.

No. The cost estimate covers the flooring boxes only. Add underlay, skirting or transition strips, adhesive and fitting separately when you build your full budget.
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