Tile Quantity Calculator
Calculate how many tiles a floor or wall needs, including grout lines, cuts and a breakage allowance.
At a glance
- What you enter
- Area length, Area width, Tile length, Tile width, Grout line, Cut and breakage allowance, Tiles in a box, Price per tile
- What you get
- Area to tile, Tiles per square metre, Tiles for the bare area, Tiles with five percent for cuts, Tiles with ten percent for cuts, Tiles to buy, Tiles that are spare or lost to cuts, Boxes to buy, Tiles you will own, Spare tiles beyond the bare area, Coverage of one box, Cost of the tiles, Cost of the tiles lost to cuts and breakage
- Formula shown
- Yes, every step, right below your results.
- Cost and privacy
- Free, no account needed, and nothing you type is stored.
See worked examples ↓ Read the FAQ ↓ Share this calculator ↓
Results are estimates for general information only, always verify with a professional or official source before acting on them.
How to use the Tile Quantity Calculator
- 1 Enter Area length (m), The floor or wall being tiled. Measure the longest run and the widest point.
- 2 Enter Area width (m)
- 3 Enter Tile length (mm), Standard sizes are 150, 300, 450, 600 and 900 mm square, plus 300 by 600 rectangles.
- 4 Enter Tile width (mm), Equal to the length for a square tile.
- 5 Enter Grout line (mm), Two to three millimetres is typical for a rectified porcelain, three to five for a ceramic with a rounded edge.
- 6 Enter Cut and breakage allowance (%), Five percent for a plain straight laid floor, ten for a room with obstacles or a diagonal layout.
- 7 Enter Tiles in a box, Usually printed on the box along with the coverage in square metres.
- 8 Enter Price per tile, Optional. Used to show what the waste allowance costs.
- 9 Press Calculate. You get Area to tile, Tiles per square metre, Tiles for the bare area, Tiles with five percent for cuts, Tiles with ten percent for cuts, Tiles to buy, Tiles that are spare or lost to cuts, Boxes to buy, Tiles you will own, Spare tiles beyond the bare area, Coverage of one box, Cost of the tiles, Cost of the tiles lost to cuts and breakage, and every intermediate step stays visible under "How is this calculated?"
- 10 Change one number at a time to see what moves the result, that is usually the most useful thing a calculator can tell you.
Worked examples
Real numbers run through this calculator. Open any example to load it into the form above and change it.
A 3 by 2 metre floor in 300 mm tiles
300 by 300 millimetre tiles, 3 millimetre grout, ten percent allowance, eleven tiles per box.
You enter
- Area length
- 3 m
- Area width
- 2 m
- Tile length
- 300 mm
- Tile width
- 300 mm
- Grout line
- 3 mm
- Cut and breakage allowance
- 10%
- Tiles in a box
- 11
- Price per tile
- $3.00
You get
- Area to tile
- 6.00 sq m
- Tiles per square metre
- 10.89
- Tiles for the bare area
- 66
- Tiles with five percent for cuts
- 69
- Tiles with ten percent for cuts
- 72
- Tiles to buy
- 72
- Tiles that are spare or lost to cuts
- 6
- Boxes to buy
- 7
- Tiles you will own
- 77
- Spare tiles beyond the bare area
- 11
- Coverage of one box
- 1.01 sq m
- Cost of the tiles
- $216.00
- Cost of the tiles lost to cuts and breakage
- $18.00
About 65.3 tiles for the bare area, so 72 with the allowance, which is seven boxes and 77 tiles owned. The surplus is eleven tiles, one full box.
A bathroom floor laid diagonally
A 2.4 by 1.8 metre floor in 200 millimetre tiles, fifteen percent for the diagonal.
You enter
- Area length
- 2.40 m
- Area width
- 1.80 m
- Tile length
- 200 mm
- Tile width
- 200 mm
- Grout line
- 3 mm
- Cut and breakage allowance
- 15%
- Tiles in a box
- 25
- Price per tile
- $1.80
You get
- Area to tile
- 4.32 sq m
- Tiles per square metre
- 24.27
- Tiles for the bare area
- 105
- Tiles with five percent for cuts
- 111
- Tiles with ten percent for cuts
- 116
- Tiles to buy
- 121
- Tiles that are spare or lost to cuts
- 16
- Boxes to buy
- 5
- Tiles you will own
- 125
- Spare tiles beyond the bare area
- 20
- Coverage of one box
- 1.03 sq m
- Cost of the tiles
- $217.80
- Cost of the tiles lost to cuts and breakage
- $28.80
The diagonal layout is the reason for fifteen percent rather than ten, and the box of 25 tiles makes the surplus easy to store.
A large format kitchen floor
A 5 by 4 metre kitchen in 600 by 600 tiles, ten percent allowance.
You enter
- Area length
- 5 m
- Area width
- 4 m
- Tile length
- 600 mm
- Tile width
- 600 mm
- Grout line
- 3 mm
- Cut and breakage allowance
- 10%
- Tiles in a box
- 4
- Price per tile
- $9.00
You get
- Area to tile
- 20.00 sq m
- Tiles per square metre
- 2.75
- Tiles for the bare area
- 56
- Tiles with five percent for cuts
- 58
- Tiles with ten percent for cuts
- 61
- Tiles to buy
- 61
- Tiles that are spare or lost to cuts
- 5
- Boxes to buy
- 16
- Tiles you will own
- 64
- Spare tiles beyond the bare area
- 8
- Coverage of one box
- 1.45 sq m
- Cost of the tiles
- $549.00
- Cost of the tiles lost to cuts and breakage
- $45.00
Fewer, larger tiles means each cut costs more, which is why the waste line is worth watching on large format work.
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