CalculatorHandy

Everyday Calculators

Flooring Calculator

Work out how much laminate, vinyl, hardwood or carpet to buy. Add each room or area, include a cutting allowance, and enter the box coverage and price.

Units
Rooms (length × width)
%

5–10% for straight lay; 15% or more for diagonal or herringbone.

In m² (metric) or ft² (US), printed on the box.

$
Flooring to buy33.55 m²
Floor area
30.5 m²
Waste allowance
3.05 m²
Boxes needed
16
In square feet
361.1 ft²
Step-by-step working
  1. Area = 5×4 + 3.5×3 = 30.5 m²
  2. + 10% waste = 33.55 m²
  3. 33.55 ÷ 2.2 per box = 15.25 → 16 boxes

How to use the Flooring Calculator

  1. Choose units and add each rectangular area.
  2. Set a waste allowance.
  3. Optionally add coverage per box and price, then press Calculate.

Formula

Total = Σ(length × width) × (1 + waste%). Boxes = ⌈total ÷ coverage per box⌉.

For L-shaped rooms, split them into rectangles and add each one as a row.

Examples

  • 5 × 4 m and 3.5 × 3 m rooms, 10% waste, 2.2 m² boxes: 30.5 m² → 33.55 m² → 16 boxes.

Frequently asked questions

Should I keep spare boards?

Yes. Keeping a few spare boards from the same batch makes future repairs much easier.

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