Floor and tile calculator (boxes)
Find out how many boxes of flooring or tile to buy for a room, including waste margin.
Boxes needed
11
Area with waste22 m²
Purchased area22 m²
The waste margin (10% standard) covers cuts and breakage. Diagonal layouts need 15%.
How the calculation works
Boxes = ceil(area × (1 + waste%) ÷ m² per box), always rounded up — you can't buy half a box.
Frequently asked questions
How much waste to consider?
10% for straight layout and 15% for diagonal or rooms with many cuts.
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Updated on June 17, 2026 · by Rafael Rossi · Methodology & sources