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Tile Calculator

Calculates how many tiles a floor or wall needs from the area and tile size, including a wastage allowance and the number of boxes.

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Enter your figures and press Calculate.
In short Tile Calculator is a free online tool on inputtesthub.com that calculates how many tiles a floor or wall needs from the area and tile size, including a wastage allowance and the number of boxes. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.

How to use the Tile Calculator

  1. Enter your figures in the input fields.
  2. The result updates as you type, together with the full working.
  3. Check the breakdown table to see exactly how the number was reached.

About the Tile Calculator

The Tile Calculator calculates how many tiles a floor or wall needs from the area and tile size, including a wastage allowance and the number of boxes. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.

What people use it for

  • Ordering floor tiles for a room.
  • Checking how many boxes a bathroom needs.
  • Adding the right wastage for a diagonal layout.

Details

Straight layout10% wastage is normal
Diagonal or herringbone15% or more
Many cuts and fittings15–20%
Common tile sizes30×30, 30×60, 60×60, 80×80 cm

The maths behind it

This tool uses Tiles = area ÷ (tile width × tile height), then multiplied by 1 + wastage%, rounded up to a whole tile. Every intermediate value is shown on screen, so the result can be checked by hand.

Buy the whole quantity in one order. Tile batches vary in shade, and a replacement box bought weeks later rarely matches the ones already on the floor.

Frequently asked questions

How much wastage should I allow for tiles?
Ten per cent for a simple rectangular room laid straight. Fifteen for a diagonal or herringbone pattern, and up to twenty for a room with lots of cuts around fittings, because every cut produces an offcut you usually cannot reuse.
How many 60×60 tiles are in a square metre?
Just under three — a 60×60 cm tile is 0.36 m², so 2.78 tiles per m². The calculator handles this for any size you enter, including grout joints in the effective spacing.
Does the Tile Calculator cost anything?
There is no cost and no cap. The Tile Calculator is not a demo of a paid product, so nothing is held back or watermarked.
Is what I paste into the Tile Calculator stored?
No. The Tile Calculator runs entirely in your browser using JavaScript. Because the work happens locally, the page also keeps working if your connection drops, and closing the tab is all it takes to discard everything.
What formula does the Tile Calculator use?
It uses Tiles = area ÷ (tile width × tile height), then multiplied by 1 + wastage%, rounded up to a whole tile. The full working is printed under the result, so you can follow every step rather than trusting a black box.
What problem does the Tile Calculator solve?
Typical uses: ordering floor tiles for a room. Checking how many boxes a bathroom needs. Adding the right wastage for a diagonal layout. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
What do people usually get wrong here?
Buy the whole quantity in one order. Tile batches vary in shade, and a replacement box bought weeks later rarely matches the ones already on the floor.
What are the key numbers for the Tile Calculator?
Straight layout is 10% wastage is normal. Diagonal or herringbone is 15% or more. Many cuts and fittings is 15–20%. These are printed on the page itself, so you do not have to take them on trust.
Can I rely on this for exact work?
The calculation runs in double precision and the result is shown to ten significant figures, so converting a value and converting it back returns the original. What is displayed is rounded for readability; what is copied is not.

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