Flooring Calculator
Enter the room size, the size of one tile or plank and the waste allowance.
This result is an estimate only. Double-check important figures before relying on them.
How it is calculated
- Room area = length × width
- Area with waste = area × (1 + waste %)
- Pieces = area with waste ÷ area of one piece, rounded up
For other area sums, use the area calculator.
Worked example
A 5 × 4 m room, 1.2 × 0.2 m planks and 10% waste:
- Area = 20 m², with waste 22 m²
- Pieces = 22 ÷ 0.24 = 92
Why your number may differ
Pattern matching, grout widths and room shape change the real count. Buy a few extra for future repairs.
Frequently asked questions
How many tiles do I need?
Divide the room area, plus waste, by the area of one tile, and round up. 20 m² with 10% waste in 0.24 m² planks needs 92.
How much waste should I allow?
About 10% for simple layouts, and more for diagonal patterns, patterned tiles or rooms with many corners.
What about boxes?
Tiles and planks are sold in boxes with a set area. Divide the area with waste by the area per box and round up.