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How Much Does It Cost?

Tile calculator

For tiling you have to buy whole boxes plus some spare. This calculator uses the real size of each tile plus its joint and tells you how many boxes to order and how many tiles will be left over.

Home improvement Updated:

Inputs

m
m
cm
cm
mm
%

Typical: 5–10%; more for diagonal or herringbone layouts.

$

Starting values are editable examples, not official prices. Results update automatically as you change the inputs.

Result

Tile calculator — How Much Does It Cost?

Tiles needed

46 units

Boxes needed
6 units
Area
7.5 m²
Tiles without allowance
42 units
Spare tiles when buying full boxes
2 units
Calculation breakdown
  1. Area = 7.5 m²
  2. Tile area incl. joint = (width + joint) × (length + joint) = 0.18 m²
  3. Tiles = 7.5 m² ÷ 0.18 m² × (1 + allowance) = 46, rounded up
  4. Boxes = 46 ÷ tiles per box = 6

Indicative result based on the data you entered. It does not replace a professional quote or your actual bill.

How it is calculated

Tile area = (width + joint) × (length + joint).

Tiles = area ÷ tile area × (1 + allowance), rounded up. Boxes = tiles ÷ tiles per box, rounded up.

Worked example

Using the calculator’s example values:

  • Area: Length × width
  • Surface length: 3 m
  • Surface width or height: 2.5 m
  • Tile width: 30 cm
  • Tile length: 60 cm
  • Joint width: 2 mm
  • Allowance for cuts and breakage: 10%
  • Tiles per box: 8
  • Price per box (optional): $0.00

Result: Tiles needed — 46 units (boxes needed: 6 units; area: 7.5 m²; tiles without allowance: 42 units).

Money-saving tips

  • Keep a few spare tiles for repairs: designs get discontinued.
  • Diagonal or herringbone layouts need a bigger allowance.
  • Check that all boxes share the same batch and shade.

Frequently asked questions

What cutting allowance should I use?

5–10% is typical for straight layouts; more for spaces with many cuts or complex patterns.

Does the joint matter?

With small tiles yes, because joints take up a noticeable part of the area.

How do I handle a wall with a window?

Use the known-area mode and subtract the window from the total area.

How we calculate and the limits of the results: Methodology.

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