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Everyday Calculators

Tile Calculator

Estimate how many tiles to buy for a floor or wall. Enter the area dimensions, the tile size and grout joint, and a waste allowance for cuts and breakage.

Units
m
m
cm
cm
mm
%
$
Tiles needed22including 10% waste
Area
7.2 m²
Tiles without waste
20
Boxes
6
Step-by-step working
  1. Tile + grout footprint = 60.3 × 60.3 cm = 0.3636 m²
  2. Area ÷ footprint = 7.2 ÷ 0.3636 = 19.8 tiles
  3. + 10% and round up = 22

How to use the Tile Calculator

  1. Choose units and enter the area to tile.
  2. Enter the tile size and grout joint width.
  3. Set waste and, optionally, tiles per box and price.
  4. Press Calculate.

Formula

Tiles = ⌈area ÷ ((tile length + joint) × (tile width + joint)) × (1 + waste%)⌉

Examples

  • 3 × 2.4 m floor, 60 × 60 cm tiles, 3 mm joints, 10% waste: 7.2 ÷ 0.3636 = 19.8 → 22 tiles (6 boxes of 4).

Frequently asked questions

How much waste should I allow?

About 10% for a straight pattern and 15–20% for diagonal layouts, large tiles or rooms with many corners.

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