Tile Calculator
Calculate tiles needed for flooring and wall projects with waste factor
Room Dimensions
Tile Specifications
Additional Options
Pricing (Optional)
Total Tiles Needed
Base: 118 + 10% waste
Room Area
11.1 sq m
Boxes Needed
130 tiles total (0 extra)
Coverage per Box
10 tiles per box
Cost Estimate
Tile Information
How it works
A tile calculator divides the surface area by the area of one tile to get the tile count, then adds waste for cuts and breakage. Keep your units consistent — convert tile dimensions to feet (or the area to square inches) before dividing.
Tiles needed
Tiles = surface area ÷ tile area then × (1 + waste%)
- surface area
- wall or floor area to cover
- tile area
- size of one tile
- waste%
- 10% typical, more for diagonal layouts
Worked example
- Floor = 120 ft²
- 12×12 in tiles = 1 ft² each
- 10% waste
- Tiles = 120 ÷ 1 = 120
- With waste = 120 × 1.10
Order ≈ 132 tiles.
Good to know
- Always buy spares from the same batch for future repairs — colors drift between production runs.
- Diagonal and herringbone patterns waste more; raise the waste factor to 15%+.
- Factor in grout, spacers, and thinset separately.
Related Calculators
Frequently Asked Questions
How many tiles do I need for my project?
Divide the area to cover by the area of one tile, then add a waste factor. A 120 sq ft floor with 12 x 12 inch tiles needs 120 tiles plus about 10% extra — 132 tiles total.
How much extra tile should I order for waste?
Add 10% for straight layouts and 15-20% for diagonal, herringbone, or rooms with many cuts. Keep a few spares after the job: matching a discontinued tile for a future repair is nearly impossible.
Do grout lines change how many tiles I need?
Slightly — each tile effectively covers its own size plus the grout joint, so wider joints mean marginally fewer tiles. The effect is small for large tiles but noticeable with mosaics and wide joints.
How do I convert tile count to boxes?
Tile boxes list coverage in square feet. Divide your total area (including waste) by the coverage per box and round up to whole boxes — and buy all boxes from the same dye lot so the shade matches.
Should tile from different batches be mixed?
Avoid it — color and size vary subtly between production runs (dye lots). If you must mix batches, blend tiles from all boxes as you lay them so any variation is dispersed rather than concentrated in one area.