Tile Calculator
Calculate exactly how many tiles you need based on your area size and tile dimensions, with a waste allowance built in.
Result
Enter your numbers to see the estimate.
How this calculator works
Tiling projects fail fast when you run short mid-job and the store is out of your batch — tile color can vary slightly between production runs, so buying enough the first time matters. This calculator divides your total project area by the area of a single tile to get a raw tile count, then adds your waste percentage to cover cuts, breakage and edge pieces.
Tile waste depends heavily on layout: a simple grid pattern on a rectangular floor might only need 10% extra, while a diagonal layout, herringbone pattern, or a room with lots of corners, niches or curves can easily need 15-20% extra. Larger tiles generally waste more per cut than smaller mosaic tiles, since a single miscut wastes more material.
Remember that tiles are usually sold by the box, and boxes cover a fixed area (check the box label). Round your final quantity up to the nearest full box — this calculator gives you the raw tile count, which you can then match to your supplier's box coverage.
Example: A 10 ft × 10 ft floor (100 sq ft) using 12 in × 12 in tiles needs 100 tiles, or 110 tiles with a 10% waste allowance.
How it works
Enter your measurements or costs
Fill in the room size, materials or costs for your project. No sign-up required.
Adjust the settings
Choose your units, waste percentage and any project-specific options.
Get your estimate instantly
See your results calculated instantly, right in your browser.
Frequently asked questions
How many tiles do I need for my floor?
Divide your total floor area by the area of one tile, then add 10% for waste. This calculator does the math automatically from your area and tile dimensions.
How much extra tile should I buy?
10% is standard for simple layouts. Diagonal patterns, herringbone layouts or irregular rooms should use 15-20% to account for extra cuts.
Should I buy tiles in boxes or individually?
Most suppliers sell tile by the box, with a fixed coverage area printed on the box. Round your calculated quantity up to the nearest full box, and consider buying one extra box for future repairs.
Does grout width affect the tile count?
Grout lines have a minor effect on tile count for most standard sizes, and this calculator doesn't factor in grout spacing precisely. For very large tiles or wide grout lines, add a small buffer.
Do I need to create an account to use this?
No. HomeCalc calculators work instantly with no sign-up, no login and no payment required.