🧱 Tile Calculator
Calculate tile quantities for floors, walls, backsplashes, and other tile installations.
Quick Formula
Square Footage
Area = Length × Width
Tiles Needed
Tiles = (Area ÷ Tile Size) × Waste Factor
Tile Sizes
Common Sizes
| Size | Square Feet | Use |
|---|---|---|
| 12" × 12" | 1.0 sq ft | Floor, wall |
| 18" × 18" | 2.25 sq ft | Floor |
| 24" × 24" | 4.0 sq ft | Floor |
| 6" × 6" | 0.25 sq ft | Backsplash, accent |
| 3" × 6" | 0.125 sq ft | Subway tile |
Waste Factors
| Application | Waste Factor | Notes |
|---|---|---|
| Simple layout | 5-10% | Rectangular rooms |
| Complex layout | 10-15% | Many cuts, angles |
| Diagonal layout | 15-20% | Diagonal installation |
| Mosaic | 10-15% | Small tiles |
Common Calculations
Example 1: Floor Tile
Room: 12' × 14' = 168 sq ft Tile: 12" × 12" (1 sq ft each) Waste: 10%
Calculation:
- Area: 168 sq ft
- Base tiles: 168 tiles
- With waste: 168 × 1.10 = 185 tiles
Example 2: Backsplash
Area: 10 linear feet × 18" high = 15 sq ft Tile: 3" × 6" subway (0.125 sq ft each) Waste: 10%
Calculation:
- Area: 15 sq ft
- Base tiles: 15 ÷ 0.125 = 120 tiles
- With waste: 120 × 1.10 = 132 tiles
Grout Calculation
Grout Needed
Grout = (Tile Area × Grout Width × Depth) ÷ Coverage
Typical coverage:
- 1/8" grout lines: ~25-30 sq ft per pound
- 1/4" grout lines: ~15-20 sq ft per pound
Related Resources
- Flooring Calculator - Other flooring types
- Construction Math Reference - Area calculations
Order Extra
Always order 10% extra tile. Matching discontinued tile later is expensive or impossible.