Tile Calculator
Estimate how many tiles to buy for a floor or a wall, including a wastage allowance.
Enter the values and press Calculate.
Your result will show here.
About this calculator
Tile quantity is the area you want to cover divided by the area of one tile, then increased for cuts and breakage. A straight lay on a simple rectangle often uses about 10% extra. A diagonal lay or a room full of corners needs more. The wastage box is there so you can change it instead of trusting a single percent.
Units are mixed on purpose. Rooms in India are often measured in feet, and tile cartons are often labelled in inches or centimetres. The calculator converts both to square feet before it divides.
If you know how many tiles are in a box, enter that number and the result includes boxes, rounded up. You cannot buy a fraction of a box.
Order the extra tiles with the first lot. Shade varies between batches, and a repair next year is easier if a few tiles are left over.
Tile count
Area = room length × room width, converted to square feet Tile area = tile length × tile width, in square feet Tiles before wastage = area ÷ tile area Tiles to buy = that number × (1 + wastage%) , rounded up Boxes = tiles ÷ tiles per box, rounded up
Example: 12 ft by 10 ft, 24 inch tiles
A 12 ft × 10 ft floor is 120 sq ft. A 24 inch tile is 2 ft × 2 ft, so 4 sq ft. That is 30 tiles before wastage.
With 10% wastage the buy quantity is 33 tiles.
12 × 10 ft with 2 × 2 ft tiles
10% wastage, rounded up.
33 tiles
How to use
- Enter the room length and width and their unit.
- Enter one tile’s length and width and their unit. Inches are the default.
- Leave wastage at 10% unless the pattern needs more.
- Enter tiles per box only if you want a box count.
- Press Calculate.
Important notes
- Diagonal laying, niches, and a lot of cutting need more than 10%.
- Buy extra from the same batch. A later box can differ in shade.
- This is one rectangle. Add another calculation for a second room.
- Grout gap is not subtracted. Ignoring it slightly overestimates the count, which is safer than running short.
FAQ
How much wastage should I add?
10% is a common allowance for a straight lay. Increase it for diagonals and awkward rooms.
Do I subtract the gap for grout?
This tool does not. Skipping the grout gap overestimates the tiles slightly.
Can I mix feet and inches?
Yes. Set the room unit and the tile unit separately. Both are converted to square feet.
What if the room is not a rectangle?
Split it into rectangles, calculate each one, and add the tile counts.
Disclaimer
Results are estimates for general information. Verify important decisions with an appropriate professional or official source. Site conditions, cuts, and wastage vary. Treat the quantity as a planning estimate.
Last updated 5 October 2026.