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Calculate the number of tiles, boxes, grout, and thinset needed for your floor or wall project. Supports multiple tile sizes, patterns, and grout widths with cost estimates.
Straight rows and columns
0 boxes (0 tiles actual)
~0 lbs (10 lb bags)
50 lb bags
Result multiplied by (1 + Waste%) for safety margin
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Measure length and width of the area in feet. Multiply for total square footage.
Add grout joint width to tile dimensions, then calculate coverage per tile in square feet.
Tiles = (Area ÷ Tile Coverage) × (1 + Waste%)
| Tile Size | Sq In | Sq Ft per Tile | Tiles per 100 Sq Ft | Best For |
|---|---|---|---|---|
| 4" × 4" | 16 | 0.111 | 900 | Accents, backsplash |
| 6" × 6" | 36 | 0.25 | 400 | Backsplash, small bath |
| 12" × 12" | 144 | 1 | 100 | Most floors & walls |
| 12" × 24" | 288 | 2 | 50 | Modern look, fewer grout lines |
| 18" × 18" | 324 | 2.25 | 45 | Large floors |
| 24" × 24" | 576 | 4 | 25 | Large open spaces |
*Actual tiles needed varies based on grout width and waste factor
Straight rows and columns
10% waste factor
50% offset pattern
12% waste factor
45-degree angle
15% waste factor
Zig-zag pattern
20% waste factor
V-shape pattern
20% waste factor
Alternating horizontal/vertical
15% waste factor
Grout needed depends on tile size, thickness, and joint width.
| Tile Size | 1/8" Joint | 1/4" Joint |
|---|---|---|
| 12×12 | ~1 lb/10 sq ft | ~2 lb/10 sq ft |
| 6×6 | ~1.5 lb/10 sq ft | ~3 lb/10 sq ft |
| 18×18 | ~0.7 lb/10 sq ft | ~1.4 lb/10 sq ft |
Depends on trowel notch size and tile size.
| Trowel Size | 50 lb Bag Covers |
|---|---|
| 1/4" × 1/4" square | 95-100 sq ft |
| 1/4" × 3/8" square | 60-70 sq ft |
| 1/2" × 1/2" square | 40-50 sq ft |
Measure wall height × width for area. Don't subtract small openings under 2 sq ft. Use 15% waste for walls due to more edge cuts.
1/16" for rectified tiles, 1/8" standard for most tiles, 1/4"+ for large format or uneven tiles. Larger joints are more forgiving of imperfections.
Yes, tiles larger than 15" should be back-buttered (thin layer of thinset on tile back) in addition to floor application for full coverage.
10% for simple layouts, 15-20% for diagonal/herringbone. Keep extra tiles for future repairs - matching dye lots can be impossible later.