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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. Order 10% extra for straight layouts and 15% for diagonal.

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.

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