How much wastage should I allow?

Around 10% is a common starting point, but complex layouts may need more.

Should I buy extra tiles?

Yes. Extra matching tiles can be useful for cuts, breakages and future repairs.

Does grout gap affect the estimate?

Small grout gaps usually make little difference for a rough purchasing estimate.

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Tile Calculator

Estimate tiles required with wastage.

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Area length (m)

Area width (m)

Tile length (cm)

Tile width (cm)

Wastage (%)

Estimate

Enter your values.

How to use this tool

Enter the surface dimensions and tile size, then add a wastage allowance. UsefulFox estimates the number of tiles needed.

Useful example

A 10 m² floor can require more than exactly 10 m² of tiles because cuts and damaged pieces create wastage.

What can it be used for?

Bathroom walls, splashbacks, floors, utility rooms and other tiling projects.

Frequently asked questions

1Why add wastage?

Cuts, breakages and pattern matching can increase the quantity required.

2Should I round up?

Yes. Tiles are normally bought as whole pieces or packs.

3What about irregular rooms?

Split the area into simpler shapes and add their areas.

4Does layout affect wastage?

Yes. Diagonal and complex patterns can create more offcuts.

Tile Calculator Guide

Estimate tiles with sensible allowance for cuts and breakages. The calculator above does the arithmetic; these checks help you feed it better measurements and interpret the result sensibly.

How to get a better estimate

Calculate the total wall or floor area to be tiled.

Use the actual dimensions of the tile you intend to buy, and include a sensible waste allowance for cuts and breakages.

Round up to complete tiles or boxes rather than relying on a fractional result.

Quick example

For 12 m² of surface with a 10% planning allowance, calculate for 13.2 m². The exact number of tiles or boxes then depends on the tile size and the coverage stated on the packaging.

Before you buy

Use the result as a planning estimate, then check the dimensions, coverage, pack size and instructions for the actual product you intend to use. Round purchasing quantities appropriately rather than assuming a calculated fraction can be bought.

Common questions

Do patterned layouts need more tiles?

Often, yes. Diagonal and patterned layouts can create more cuts and unusable offcuts than a simple straight layout.

Should I buy all tiles at once?

It is sensible where possible. Tiles from different production batches can sometimes vary slightly in shade or finish.

UsefulFox provides estimates for planning and comparison. Actual material requirements can vary with the product, surface, layout, installation method and site conditions.