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Flooring / Tile Calculator

Enter a room's dimensions and a tile's size to see how many tiles — and boxes — to buy, including a waste allowance.

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Flooring / Tile Calculator

Results

Room area
20.00 m²
Tiles to buy
62
Boxes to buy
16
Area covered
22.32 m²

How it works

  1. Enter your input

    Fill in the values, paste your text, or upload the file this tool works with.

  2. See results instantly

    Most tools update live as you type; a few use a single button. Either way, the result appears right on this page.

  3. Use your results

    Copy, download, or share what the tool produces — you're always in control of the output.

Privacy and processing — Runs locally in your browser. This tool does not upload your input.

What is Flooring / Tile Calculator?

Enter a room's dimensions and a tile's size to see how many tiles — and how many boxes — to buy, including a waste allowance.

UNDERSTAND THE TOOL

How to calculate tiles and boxes needed for a floor

How the calculation works

Formula
tiles = ceil((room_area / tile_area) × (1 + waste%))

How to use it

  • Enter the room's length and width, in meters.
  • Enter the tile's length and width, in centimeters.
  • Enter a waste percentage and, optionally, tiles per box.

Choosing a waste allowance

10% is a common default for a simple rectangular room laid straight. Diagonal layouts, herringbone patterns, rooms with many corners, or a first-time DIY installation typically warrant 15–20% instead, since more tiles get cut down or broken.

Worked example

3 m by 4 m room with 60 x 60 cm tiles

With 10% waste, buy 37 tiles, or 4 boxes if each box holds 10.

ceil((12 / 0.36) * 1.10) = 37

Material estimate notes

Room and tile dimensions stay in the browser. The result is an area-based estimate, so measure irregular spaces separately before buying material.

Frequently Asked Questions

How much waste should I add?

10% for a simple rectangular room and a straight layout; 15–20% for diagonal or patterned layouts, irregular rooms, or if you're new to tiling.

Does this account for pattern layouts like herringbone?

No — it assumes a simple grid layout. A patterned layout wastes more material than this estimate accounts for, so raise the waste percentage to compensate.

What if my room isn't a rectangle?

Split it into rectangular sections, calculate each separately, and add the tile counts together — the area-based math stays accurate as long as each section is measured correctly.

Why are tiles rounded up?

You cannot buy part of a tile. The calculator applies the waste percentage and then rounds up to whole tiles.

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