Calculate the exact number of tiles needed for any floor or wall project. Includes thinset mortar, grout, and waste factor estimates. Supports all common tile sizes from 4×12 subway to 24×24 large format.
Tiling a 10×12 foot bathroom floor with 12×12 inch tiles at a 10% waste factor? You need approximately 132 tiles. For adhesive, plan on 3 bags of 50-lb thinset mortar and 2 bags of grout. With 1/8-inch grout lines, the grout coverage is about 70 square feet per bag. At $2–$4 per tile, the tile cost runs $264–$528 before adhesive and grout.
| Room Size | 12×12 Tiles | 6×6 Tiles |
|---|---|---|
| 5×8 ft (bathroom) | 44 | 176 |
| 10×10 ft | 110 | 440 |
| 10×12 ft | 132 | 528 |
| 12×14 ft | 185 | 740 |
| 15×20 ft | 330 | 1,320 |
All counts include 10% waste factor.
Exactly 1 tile per square foot before waste. Add 10% waste for straight layouts or 15% for diagonal patterns.
A 50-lb bag covers approximately 50–80 square feet depending on your trowel notch size. Larger tiles require larger trowel notches and use more thinset.
10% extra for standard straight layouts. 15% for diagonal, herringbone, or complex patterns. Keep a few extra tiles stored for future repairs.
1/8 inch is standard for most floor tile. Use 1/16 inch for rectified tile with tight joints. Use 3/16 to 1/4 inch for rustic or handmade tile with slight size variations.
Yes. Measure the wall height and width instead of floor length and width. The tile, thinset, and grout calculations work the same way.
Tiling a bathroom floor? See our tile installation guide for layout planning, mortar mixing, and grouting tips.
Typical Results
💡 Always buy 10–15% extra. Tile from different production lots can have slight color variation.