A free tile calculator for any tile size, with extra for cuts and the boxes to buy.
Work out how many tiles and boxes a floor or wall takes, with extra for cuts.
Your numbers
The extra covers cut tiles at the edges and a few spares for repairs later.
Your result
Fill in the fields above to see your result.
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This free tile calculator works out how many tiles a floor, a wall or a backsplash takes, for any tile size.
It adds extra for cuts and spares, and counts the boxes.
I built it because tiles are sold by the box but laid 1 by 1, and the cut tiles at the edges add up.
Here's the formula, a worked example, and the mistakes to avoid.
TL;DRKey takeaways
What is a tile calculator?
A tile calculator turns the size of a floor or wall into the tiles and boxes to buy.
It works for any tile size, in inches or centimeters.
How tiles are counted
A square foot is 144 square inches, so a tile's area in square feet is width × height ÷ 144.
- Square feet each
- 1
- Tiles for 100 sq ft
- 100
- Square feet each
- 2
- Tiles for 100 sq ft
- 50
- Square feet each
- 1
- Tiles for 100 sq ft
- 100
- Square feet each
- 2.25
- Tiles for 100 sq ft
- 45
- Square feet each
- 0.125
- Tiles for 100 sq ft
- 800
The count uses the tile's own size, so the grout lines leave a little spare.
A worked example
Here's the example the calculator loads: an 8 by 6 foot floor, 12 by 12 inch tiles, 10% extra and 15 tiles a box.
8 × 6 = 48 square feet. + 10% = 52.8. Each tile covers 1 square foot, so 53 tiles. 53 ÷ 15 = 3.5, so 4 boxes.
Mistakes to avoid
These are the slips that come up most.
- Mixing the tile's inches with the room's feet
- Buying no spares for repairs later
- Rounding the boxes down instead of up
Who is the tile calculator for?
It's for anyone tiling a bathroom, a kitchen or a floor, and these tools help around it.
- Flooring calculator – for planks or vinyl
- Square footage calculator – for any area
- Paint calculator – for the walls around the tile
Count the tiles first, and the last row won't come up short.
Plan your money with your AI
Take your numbers further in
Tile Calculator FAQs
Questions about the tile calculator? Here's what to know.
A tile calculator works out how many tiles and boxes a floor or wall takes.
Add extra to the area, divide by 1 tile's area, and round up.
100 tiles, or 110 with 10% extra.
2 square feet.
Set your own share for cuts and spares.
The calculator's example uses 10%.
No, it uses the tile's own size, so the grout lines leave a little spare.
Yes, switch to meters and type the tile's size in centimeters.
Yes, it's free with no sign-up.
It runs in your browser, and your numbers stay on your device.
I did.
I'm Navid Moazzez, and I made the tile calculator as one of my free tools on navid.me.
More about me.
Navid Moazzez
AI business strategist & AI OS builder
Navid Moazzez helps creators and founders master AI and build their own AI Operating System (AI OS) to automate their business and life.
Navid.me is reader-supported. When you buy through links on this site, I may earn an affiliate commission. Learn more.
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