Skip to content
Gallop DesignPractical calculators for better home projects
Gallop Home Tool

Tile Calculator

Estimate the number of tiles and boxes needed for a rectangular floor or wall, including waste and material cost.

Metric Calculator
1

Surface measurements

Enter the floor or wall dimensions in metres.

m
m
2

Tile measurements

Use the dimensions printed on the tile package.

cm
cm
%
Use 10% for ordinary layouts and more for diagonal patterns or rooms requiring many cuts.
3

Cost details

These fields are optional.

Enter zero to calculate quantity without cost.
Reset

TILE PLANNING GUIDE

Plan Tile Quantity, Waste and Box Count Before You Buy

A useful tile estimate starts with the total surface area, then compares it with the size of one tile, adds a waste allowance, and rounds the required quantity up to complete boxes. Use these six planning steps with the calculator above before purchasing material.

01

Measure the Surface

Enter the length and width of the rectangular floor or wall area you want to cover. For irregular spaces, divide the project into smaller rectangles and calculate them separately.

Surface area = length × width
02

Enter the Tile Size

Use the tile dimensions shown on the packaging. The calculator converts centimetres to metres and finds the area covered by one tile.

Tile area = tile length × tile width
03

Calculate the Base Tile Quantity

The surface area is divided by the area of one tile. Because partial tiles cannot be purchased as a complete unit, the result is rounded upward.

Base tiles = surface area ÷ single tile area
04

Add a Waste Allowance

Extra tiles help cover cuts, breakage, pattern layout and future repairs. The calculator lets you add a waste percentage before determining the final quantity.

Required tiles = base tiles + waste tiles
05

Convert Tiles into Complete Boxes

Enter how many tiles are packed in one box. The calculator rounds the required quantity up to complete boxes and shows how many tiles will be purchased.

Boxes = required tiles ÷ tiles per box
06

Review Spare Tiles and Material Cost

After the box count is calculated, the tool shows the purchased quantity, spare tiles and total purchased coverage. Add a price per box to estimate material cost.

Estimated cost = boxes × price per box

Use the Result as a Planning Estimate

Actual tile requirements can change with room shape, diagonal or patterned layouts, grout spacing, cuts, breakage and installer methods. Complex projects may need a larger waste allowance than simple straight layouts.

Check the tile size, tiles per box and batch information on the product you intend to buy. The calculator estimates tile quantity, boxes and basic material cost; adhesive, grout, trims, labour, delivery and other project expenses are not included.