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Tile Calculator
Work out tiles, boxes, adhesive and grout from the area, tile size, grout gap and waste.
Tile calculator
Coverage per tile with joint: — · Tiles needed: —
With waste: — · Boxes: —
Adhesive: — · Grout: —
—
How to use the Tile Calculator
- Enter the area you are tiling in square metres.
- Set the tile size, grout gap, waste and tiles per box.
- Read the tiles, boxes, adhesive and grout you need to buy.
Features
- Tiles from area, tile size and grout gap
- Boxes from your tiles per box
- Adhesive from the trowel notch
- Grout estimate from size and joint width
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Frequently Asked Questions
Common questions about the free online tile calculator.
Divide the area by the coverage of one tile including the grout gap, round up, then add your
waste percentage for cuts and breakages.
A wider gap makes every tile plus its joint cover slightly more area, so a few fewer tiles
are needed for the same floor.
Ten percent suits a straight lay in a simple room, while diagonal patterns and rooms with
many cuts need 15 percent or more.
It varies by tile. Check the box label, and this calculator converts your tile count into
boxes once you enter that number.
It depends on the trowel notch. A 6 mm notch uses about 3.5 kilograms per square metre and a
12 mm notch about 6.5.
Grout depends on the tile size, the joint width and the tile thickness, so larger tiles with
wide joints use less per square metre.
Yes. Keep a spare box in case of breakages, and matching tiles can be hard to find once a
range is discontinued.
Sometimes, but the surface must be sound, flat and clean, and the extra height affects doors,
skirting and adjoining floors.
No. The tile and material estimate runs in your browser and nothing you enter is sent to a
server.
Yes. It is completely free, needs no account and you can price up as many rooms as you like.
Last updated: October 10, 2026