Order 10% extra for straight layouts and 15% for diagonal.
MEASURE. ESTIMATE. BUILD.
Tile Calculator
Enter your floor or wall area and tile size to get the number of tiles and boxes to buy, including a waste allowance for cuts.
01 / PROJECT DIMENSIONS↙
Length
Width
Waste %%
ft² per tileft²
Change any measurement to update your estimate.
02 / YOUR MATERIAL ESTIMATE
You need approximately
159 tiles
covers 158.4 ft² (incl. waste)
- Area to cover
- 158.4 ft²
- Exact amount
- 158.4 tiles
Field notes
Buy 10% over for a straight grid and 15% for diagonal or herringbone — the angled cuts at the perimeter are pure waste, and you want a few spares from the same lot for future repairs. Dry-lay a row before you spread thinset to find your layout and avoid a sliver-width cut against the most visible wall. Order all your tile in one lot; shade varies between production runs.
How the tile calculator works
The math behind the tool:
tiles = area ÷ tile area × (1 + waste%)Sources: Tile Council of North America (tile installation and layout standards).
Frequently asked questions
How many tiles do I need?
Divide the area to be tiled by the coverage of one tile, then add 10% for cuts and breakage. A 120 ft² floor with 1 ft² tiles needs about 132 tiles.
How much extra tile should I buy?
Add 10% waste for a straight grid layout and 15% for diagonal or herringbone patterns, plus keep a few spares for future repairs.
How do you calculate square feet for tile?
Multiply length by width in feet for floors, or wall run by height for walls. Add 10% for cuts, or 15% for a diagonal or offset pattern. Buy the overage in the same production run — tile colour shifts between batches, and a mid-job replacement will not match.
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