Tile Calculator
Tile count, boxes and grout for any surface.
Enter your values
Enter the area length in ft.
Enter the area width in ft.
Enter the tile width in in.
Enter the tile height in in.
Enter the waste allowance in %.
Enter the tiles per box you are working with.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Tiles needed
- 45
- Boxes to buy
- 8
- Area to cover
- 80 sq ft
- Adhesive (approx)
- 2 bags
Quick answer
Tile count is area divided by tile area, plus 10–15% for cuts and breakages.
At a glance
| What it does | Tile count, boxes and grout for any surface. |
|---|---|
| Category | Home & DIY |
| Inputs needed | Area length, Area width, Tile width, Tile height, Waste allowance, Tiles per box |
| Main output | Tiles needed |
| Cost | Free — no sign-up, no download |
How to use the Tile Calculator
- 1Measure the area to be tiled.
- 2Enter your tile dimensions in inches.
- 3Set a waste allowance and box quantity.
Inputs explained
- Area length(ft)
- Enter the area length in ft.
- Area width(ft)
- Enter the area width in ft.
- Tile width(in)
- Enter the tile width in in.
- Tile height(in)
- Enter the tile height in in.
- Waste allowance(%)
- Enter the waste allowance in %.
- Tiles per box
- Enter the tiles per box you are working with.
Worked example
Using the values the calculator loads with:
Inputs
- Area length10 ft
- Area width8 ft
- Tile width12 in
- Tile height24 in
- Waste allowance12 %
- Tiles per box6
Results
- Tiles needed45
- Boxes to buy8
- Area to cover80 sq ft
- Adhesive (approx)2 bags
Frequently asked questions
How much waste for tiles?
10% for a simple grid, 15% for diagonal layouts and 20% for herringbone or small rooms with many cuts.
Should I buy an extra box?
Yes — dye lots vary between production runs, so future repairs may not match if you buy later.
What do I need to enter into the Tile Calculator?
Just 6 values: area length, area width, tile width, tile height, waste allowance, tiles per box. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Tile Calculator work out the answer?
Tile count is area divided by tile area, plus 10–15% for cuts and breakages. The working is shown step by step so you can verify the result by hand.
Is the Tile Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.