Enter the length and width of the floor or wall, the tile size and the layout. You get the number of tiles, the square feet to buy and the boxes, with the extra a diagonal or herringbone layout needs.
100 sq ft, straight layout, with 10% extra (mosaic 10%).
| Tile size | Sq ft to buy | Tiles or sheets |
|---|---|---|
| 24 x 24 in | 110 | 28 |
| 12 x 24 in | 110 | 55 |
| 12 x 12 in | 110 | 110 |
| 6 x 24 in plank | 110 | 110 |
| 3 x 6 in subway | 110 | 880 |
| 4 x 4 in | 110 | 990 |
| Mosaic, 12 x 12 in sheets | 110 | 110 |
Area is length × width. The tool adds 10% for a straight or offset layout and 15% for diagonal or herringbone, the same allowances as the tile cost calculator.
Tile counts divide the square feet to buy by the face of one tile at its nominal size, rounded up; a 12 × 24 in tile is 2 sq ft and a 3 × 6 in subway tile is 1/8 sq ft. Mosaics are counted as 12 × 12 in sheets.
Sources:
Quantities are for planning and ordering. Check the plan, the supplier’s product data and local code before you buy; for structural concrete, follow the drawings.
A 10 × 10 ft floor is 100 sq ft. With 10% extra for a straight layout, buy 110 sq ft: 55 tiles of 12 × 24 in, or 8 boxes at 15 sq ft per box.
An 8 ft long, 5 ft high wall is 40 sq ft. With 10% extra that is 44 sq ft, or 352 subway tiles of 3 × 6 in. Subtract any large window, and add the side returns if the tile wraps a corner.
About 10% for a straight or offset layout and 15% for diagonal or herringbone, which cut a tile at every edge. Large tiles in a small room waste more, and it is worth keeping a few spare for repairs.
Tile shade varies between production runs. Buying the whole job, plus the extra, from one lot keeps the color consistent; the lot number is printed on each box.
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