Tile Calculator

How many tiles and boxes for a floor or wall

Tiles Needed

34Tiles

9Boxes (4 per box)

120 sq ftArea

11.15

Area in m²

Tiles without extra

3.88 sq ft

One tile covers

Spare tiles in last box

139.5 sq ft

Area of tiles bought

1
Measure the area
Length and width of the floor or wall
2
Enter the tile size
e.g. 600 × 600 mm or 2 × 2 ft
3
Get tiles and boxes
With extra for cuts

How many tiles do I need?

Divide the area by the area of one tile (including its share of grout), then add extra for cuts and breakages:

Tiles = area ÷ (tile length + gap) × (tile width + gap)

Add 5–10% for straight layouts, 15% for diagonal

Boxes = tiles ÷ tiles per box, rounded up

How much extra to buy

Add about 10% for normal rooms, more for diagonal or herringbone patterns, small rooms with many cuts, or large-format tiles. Keep a few spares from the same batch for future repairs, as shades vary between batches.

Walls

For walls, enter the wall's height as the width and subtract doors and windows by entering a smaller length. Tile each wall separately and add the totals.

Common tile sizes

Coverage per tile

Tile size	Sq ft per tile
300 × 300 mm (1 × 1 ft)	0.97
300 × 600 mm (1 × 2 ft)	1.94
600 × 600 mm (2 × 2 ft)	3.88
600 × 1200 mm (2 × 4 ft)	7.75
800 × 800 mm	6.89
800 × 1600 mm	13.78

Related calculators

Frequently asked questions

How many 2 × 2 tiles do I need for 100 sq ft?

About 26 tiles before extra (100 ÷ 3.88), or 29 with 10% extra.

How many tiles come in a box?

It depends on the size: 600 × 600 mm vitrified tiles usually come 4 to a box, 800 × 800 mm come 3, and 300 × 300 mm come 8–10. Check the label.

Should I include the grout gap?

Yes, for small tiles it adds up. With large tiles and 2 mm joints the difference is under 1%.

Last reviewed: October 2026