How many tiles for a 12×12 room?
Quick Answer
A 12×12 foot room (144 sq ft) needs 144 tiles if using 12×12 inch tiles — exactly 1 tile per square foot — plus 10% waste = 159 tiles. For 18×18 inch tiles, you need 67 tiles. For 24×24 inch tiles, you need 38 tiles. Always add 10% for cuts; add 15% for diagonal layouts.
Quick Reference Table
| Tile Size | Tiles for 12×12 room (144 sq ft) |
|---|---|
| 6×6" | 576 tiles + waste |
| 12×12" | 144 tiles + waste |
| 16×16" | 81 tiles + waste |
| 18×18" | 64 tiles + waste |
| 24×24" | 36 tiles + waste |
| 12×24" | 72 tiles + waste |
How to Calculate It Yourself
- 1
Measure room area: 12 × 12 = 144 sq ft.
- 2
Calculate tile coverage: (tile width in inches × tile length in inches) ÷ 144 = sq ft per tile. For 18×18: 18×18÷144 = 2.25 sq ft/tile.
- 3
Divide area by tile coverage: 144 ÷ 2.25 = 64 tiles.
- 4
Add waste: 10% for straight lay (64 × 1.10 = 71 tiles), 15% for diagonal lay (64 × 1.15 = 74 tiles). Round up to full boxes.
Pro Tip
Tiles are sold in boxes covering a set square footage — always buy full boxes and round up. Keep unopened boxes for future repairs; tiles are discontinued regularly and you won't find an exact match years later.
Assumptions to Check
Before ordering materials, confirm the dimensions, product coverage, waste factor, and local installation requirements for your project. Manufacturer coverage tables and local code rules can change the final quantity, especially for structural work, exterior projects, and irregular layouts.
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