Tile calculator

Tiles = surface area ÷ coverage per tile × (1 + allowance ÷ 100), rounded up.

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Surface area

Area covered by one tile

More inputs and assumptions

Extra allowance (%)

Answer

…

Tiles = surface area ÷ coverage per tile × (1 + allowance ÷ 100), rounded up.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Saved scenario

Save the current answer, then change an input to compare. This clears when you leave.

Formula and assumptions

Use matching area units. Layout, cuts, grout spacing and breakage determine the allowance; this quantity does not design a tile layout.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

Scratch calculator

Check another calculation

Use +, −, ×, ÷, parentheses and %. A percentage is divided by 100. This does not change the main tool.

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Updated 2026-09-26

Using Tile calculator

Tiles = surface area ÷ coverage per tile × (1 + allowance ÷ 100), rounded up.

Use matching area units. Layout, cuts, grout spacing and breakage determine the allowance; this quantity does not design a tile layout.

Next: Paint calculator

A worked example

With surface area = 100, area covered by one tile = 4, extra allowance (%) = 10, the tiles to buy is 28.

Next: Flooring calculator

Before you use the result

Use matching area units. Layout, cuts, grout spacing and breakage determine the allowance; this quantity does not design a tile layout.

Example results for surface area

These examples use Area covered by one tile: 4; Extra allowance (%): 10. They are reference calculations, not recommended settings.

Surface area	Tiles to buy
50	14
100	28
200	56

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