Tile Calculator
Enter your area and tile size to get the tile count, waste-adjusted total, and boxes needed for the job.
This calculator gives an estimate for planning purposes only. Verify quantities and code requirements with a qualified professional before ordering materials or performing work.
How it's calculated
Tiles needed
tiles = ceil((area sq ft / tile sq ft) × (1 + waste %))
Divide the room area by a single tile's area to get the raw tile count, then add a waste factor for cuts, breakage, and future repairs — 10% is standard, more for diagonal layouts or intricate patterns.
Boxes needed
boxes = ceil(tiles / tiles per box)
Round up to the nearest full box since suppliers don't sell partial boxes.
Tiles needed by room size (12"x12" tile, 10% waste)
| Room size | Area | Tiles needed |
|---|---|---|
| 8' x 10' | 80 sq ft | 88 tiles |
| 10' x 10' | 100 sq ft | 110 tiles |
| 10' x 12' | 120 sq ft | 132 tiles |
| 12' x 15' | 180 sq ft | 198 tiles |
| 15' x 20' | 300 sq ft | 330 tiles |
Skip the manual math on your next takeoff
Struvia reads your plans and pulls quantities like this automatically — upload a plan and see it measure a real takeoff.
Tile Calculator FAQ
How much waste factor should I use for tile?
10% is standard for a straightforward layout. Use 15–20% for diagonal patterns, herringbone, rooms with lots of cuts around fixtures, or if you want extra tile on hand for future repairs.
Does this account for grout lines?
No — this calculates tile area only. Grout line width has a small effect on total tile count for large format tile, but is usually within the waste factor margin for standard sizes.
How do I find tiles per box?
Check the tile packaging or product listing — it's usually printed as square footage per box or tile count per box. Enter it above to get a box count; leave it blank to just see the raw tile count.