How much tile waste should I add?

Straight layouts: 10% extra. Diagonal, herringbone, or lots of cuts: 15%. Our pattern toggle applies the right factor automatically.

How do I calculate tiles for a 12×12 floor?

Each 12×12 tile covers 1 ft². Divide your area by tile size, multiply by (1 + waste), round up. Example: 100 ft² straight lay → 110 tiles at 10% waste.

Do I need extra tiles for grout lines?

Standard grout gaps are small enough that ignoring them slightly over-estimates — which is safer. For precise layouts, see our Methodology notes.

Tile Calculator

Enter room size and tile size → get tile and box count with waste included. No signup.

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Project size

Floor/wall area (ft²)

Tile size preset

Tile width (in)

Tile height (in)

Layout pattern

Waste factor (10%)Bump to 15–20% for small rooms, lots of cuts, or herringbone

Tiles per box

Price per box ($, optional)

Price per tile ($, optional)

Result

110 tiles

11 boxes (10 per box) · 10% waste

Tile area 1 ft² (12×12 in)
100 ft² ÷ 1 × (1 + 10%) = 110 tiles

10% straight-lay and 15% diagonal waste follow standard installer allowances. Tile area = (W × H) ÷ 144 ft². Full methodology

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Frequently asked questions

How much tile waste should I add?: Straight layouts: 10% extra. Diagonal, herringbone, or lots of cuts: 15%. Our pattern toggle applies the right factor automatically.
How do I calculate tiles for a 12×12 floor?: Each 12×12 tile covers 1 ft². Divide your area by tile size, multiply by (1 + waste), round up. Example: 100 ft² straight lay → 110 tiles at 10% waste.
Do I need extra tiles for grout lines?: Standard grout gaps are small enough that ignoring them slightly over-estimates — which is safer. For precise layouts, see our Methodology notes.

Frequently asked questions

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