Free home project tool
FixCalcTile calculator: how many tiles do I need?
Multiply the surface length by its width, divide by one tile's area, then add a cutting and breakage allowance. This calculator also rounds the result up to full boxes.
Estimate tile for one rectangular floor or wall
Use the nominal dimensions and tiles-per-box count printed on the product packaging. For irregular layouts, calculate each rectangle separately and add the results.
How the tile estimate works
The calculator uses surface area ÷ tile area to find the base quantity. It multiplies that exact quantity by the selected waste allowance, rounds up to a whole tile, divides by the number of tiles per box, and rounds up again to a full box.
Grout joints are intentionally excluded because the exact reduction depends on tile layout and joint width. Keeping that small difference inside the cutting and breakage allowance is safer for a planning estimate.
Calculation method reviewed August 29, 2026.
Planning the rest of the room? Use the free paint calculator.
Using laminate, vinyl, or wood? Open the flooring calculator.
Choose an allowance carefully
- Simple straight layouts often start around 10%
- Diagonal patterns and rooms with many cuts may need more
- Keep spare matching tiles for later repairs
- Follow the installer or manufacturer's guidance when available
Worked example
A 3 m × 4 m floor has an area of 12 m². With 60 cm × 30 cm tiles, 10% waste, and eight tiles per box, the estimate is 74 tiles, rounded up to 10 full boxes containing 80 tiles.
Plan the whole project in FixCalc.
Save paint, tile, and flooring estimates, package counts, costs, and shopping lists.
