For walls, the area is the length of each wall times the height you want to tile, minus doors and windows. Enter the whole room or wall by wall, choose the tile and get the count.
Works for full-height bathroom walls, wainscots, shower surrounds and kitchen backsplashes.
How to use
- Choose whole room (perimeter × tile height) or wall by wall.
- Set how many doors and windows to subtract; open the sizes to adjust them.
- Pick the tile size and joint width.
- Type the box coverage to get the number of boxes.
Wall tiles per 100 sq ft
| Tile size | Tiles per 100 sq ft | With 10% waste | One tile covers |
|---|---|---|---|
| 3×6 in | 800 | 880 | 0.125 sq ft |
| 4×4 in | 900 | 990 | 0.111 sq ft |
| 4×12 in | 300 | 330 | 0.333 sq ft |
| 6×6 in | 400 | 440 | 0.25 sq ft |
| 12×24 in | 50 | 55 | 2 sq ft |
| 2×8 in | 900 | 990 | 0.111 sq ft |
Without grout joints.
Measuring walls for tile
Measure each wall's length and the height you'll tile: 8 ft for a full-height wall, about 6 ft around a tub or shower, 18 in for a typical backsplash. Subtract doors and windows only if they're large; small openings save fewer tiles than the cuts around them cost.
Trim and edges
Count edge pieces (bullnose or metal trim) separately, by length. A niche or a window return adds area: measure its sides and add them as extra walls.
Where the numbers come from
Coverage and consumption figures come from manufacturer data sheets and published standards: