12×12 Tile Calculator
Pre-set for 12×12 in (1 sq ft) tiles. Enter your room dimensions and the number of tiles in your specific box.
Room Dimensions
Box Info
Quick Reference: 12×12 Tile Counts by Room Size
| Room Size | Sq Ft | Tiles (10% waste) | Tiles (15% waste) |
|---|---|---|---|
| 5 × 8 ft (small bath) | 40 | 44 | 46 |
| 8 × 10 ft (bedroom) | 80 | 88 | 92 |
| 10 × 10 ft | 100 | 110 | 115 |
| 10 × 12 ft (kitchen) | 120 | 132 | 138 |
| 12 × 12 ft | 144 | 159 | 166 |
| 12 × 16 ft | 192 | 212 | 221 |
| 15 × 20 ft (living room) | 300 | 330 | 345 |
12×12 in = 1 sq ft exactly. Tile count = room sq ft × waste factor, rounded up.
Other Tile Sizes
Frequently Asked Questions
A 10 × 10 ft room is 100 sq ft. A 12×12 in tile covers exactly 1 sq ft (12 in = 1 ft, so 1 ft × 1 ft = 1 sq ft). With 10% waste you need ⌈100 × 1.10⌉ = 110 tiles. At 10 tiles per box that is 11 boxes.
A 12 × 12 ft room is 144 sq ft. At 10% waste: ⌈144 × 1.10⌉ = 159 tiles. At 10 tiles/box: 16 boxes. Use the calculator above to adjust for your exact box count.
It depends on the manufacturer and product line. Common box quantities are 8, 10, 12, or 15 tiles. The box label always states the tile count and total square footage. Enter your specific value in the "Tiles per Box" field.
Nominal 12×12 in tiles are often 11-7/8 in (11.875 in) actual face dimension — 1/8 in less per side to allow for the grout joint. Some rectified tiles are cut to a true 12.000 in. For quantity calculations, use the nominal dimension; the difference in area is negligible at room scale.
For standard (non-rectified) 12×12 tiles, a 1/8 in (3 mm) grout joint is typical. For rectified tiles a 1/16 in (1.5 mm) joint is common. Consult the tile manufacturer's instructions — natural stone often requires wider joints.