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Tile calculator

Find out how many tiles you need for a floor or wall, including waste.

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Enter Surface area (m²), Tile width (cm), Tile height (cm), Waste (%) and the Tile calculator works out Tiles needed, Area with waste (m²) straight away. For instance, with Surface area (m²) = 20, Tile width (cm) = 30, Tile height (cm) = 30 and Waste (%) = 10 it returns Tiles needed = 245 and Area with waste (m²) = 22.

How to use it

  1. Enter your values: Surface area (m²), Tile width (cm), Tile height (cm), Waste (%).
  2. Read the result instantly: Tiles needed, Area with waste (m²).

Frequently asked questions

What does the Tile calculator actually compute?

It takes Surface area (m²), Tile width (cm), Tile height (cm) and Waste (%) and derives Tiles needed and Area with waste (m²) from them. The calculation is live as you type, so the result updates on every change.

What information do I need to provide?

4 values: Surface area (m²), Tile width (cm), Tile height (cm) and Waste (%). Nothing else is required — no account, no file upload.

Can you show a worked example?

With Surface area (m²) = 20, Tile width (cm) = 30, Tile height (cm) = 30 and Waste (%) = 10, the calculator returns Tiles needed = 245 and Area with waste (m²) = 22. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

What happens if I enter larger values?

It moves a lot. Using Surface area (m²) = 22, Tile width (cm) = 60, Tile height (cm) = 60 and Waste (%) = 20 instead, Tiles needed goes from 245 to 74 — which is why it is worth testing a few scenarios rather than trusting a single figure.

What does it give for smaller values?

Scaled down to Surface area (m²) = 18, Tile width (cm) = 15, Tile height (cm) = 15 and Waste (%) = 5, Tiles needed comes out at 841. The relationship is worth checking at both ends before you rely on a single result.

When would I actually use this?

Buying the right amount at the merchant: how many tiles, how much paint, how many bags of concrete, and what it all comes to.

What is the most common mistake?

Ordering the exact calculated quantity. Cuts, breakage and pattern matching mean tiles need 10% spare and more on a diagonal layout — and a second batch rarely matches the first for colour.

How accurate is it, and what are the limits?

Estimate only — confirm quantities with your supplier.

What is the difference between the Tile calculator and the Tile Grout Calculator?

This one returns Tiles needed and Area with waste (m²); the Tile Grout Calculator returns Result. That is the whole difference — open the one whose figure you need.

Is there a tool for the next step?

Brick calculator is the closest one after this: Estimate the number of bricks for a wall from its area and brick size.

Further reading

All guides →
How-toHow Many Tiles Do You Need? (Floor and Wall)Estimate tiles from the area to cover and one tile's size, then add for cuts and waste. Here's the method, with an example and the 10% rule.How-toHow Much Paint Do You Need to Paint a Room?Estimate paint by wall area, coats and the coverage on the tin — with a worked example and the 10% rule so you buy once and match the colour.How-toHow Much Wallpaper Do You Need?Measure the wall area, divide by a roll's usable coverage, then add for pattern repeat. Here's the method, with an example and why batch numbers matter.How-toHow Much Flooring Do You Need? (With Waste)Divide the room's area by a pack's coverage, then add for cuts and waste. Here's the method, with an example and how much extra to buy.How-toHow Much Concrete Do You Need?Concrete is measured by volume: length × width × depth. Here's how to work out cubic metres, add for waste, and choose bags or ready-mix.How-toHow to Calculate the Square Metres of a RoomFind a room's area by multiplying length by width. Here's the method for rectangular, L-shaped and round rooms, and why area drives your material orders.