How much tile do I need for a bathroom floor?
A standard 5 x 8 ft bathroom floor is 40 square feet. With 10% extra for cuts, buy 44 square feet of tile, which is 3 boxes at 15 square feet per box.
Measure the whole floor, then subtract anything that won’t be tiled under, such as a built-in vanity or the tub. The table assumes the full floor, 15 sq ft per box, and 10% extra (15% for diagonal layouts).
| Bathroom | Floor area | With 10% extra | Boxes, straight | Boxes, diagonal |
|---|---|---|---|---|
| 5 x 8 ft | 40 sq ft | 44 sq ft | 3 boxes | 4 boxes |
| 6 x 8 ft | 48 sq ft | 52.8 sq ft | 4 boxes | 4 boxes |
| 8 x 10 ft | 80 sq ft | 88 sq ft | 6 boxes | 7 boxes |
| 9 x 12 ft | 108 sq ft | 118.8 sq ft | 8 boxes | 9 boxes |
Before you buy
- Buy every box from the same lot number; color varies between batches.
- Keep a few spare tiles. Matching a discontinued tile for a repair years later is often impossible.
- Large tiles (12 x 24 and up) need a flatter floor. A leveling system helps avoid lippage between tiles.