β¬ Tile Calculator
Calculate tiles needed for floors, walls, and backsplashes. Account for grout spacing, wastage, and estimate total cost.
inches
%
Total Area
100
sq ft
Tile Area (each)
1.04
sq ft
Tiles Needed
97
tiles (no waste)
Tiles with Wastage
107
tiles
Estimated Cost
β
USD
How to Calculate Tiles Needed
Accurately calculating tile quantities ensures you buy enough tiles while minimizing waste.
Tile Calculation Formula
Tiles Needed = Total Area Γ· (Tile Area including
grout)
Total with Wastage = Tiles Needed Γ (1 + Wastage%)
Common Tile Sizes Reference
Quick reference for popular tile sizes and coverage:
| Tile Size | Area (sq ft) | Tiles per Box* | Tiles for 100 sq ft |
|---|---|---|---|
| 6Γ6 in | 0.25 | 44 (11 sq ft) | ~440 tiles |
| 12Γ12 in | 1.0 | 12 (12 sq ft) | ~110 tiles |
| 12Γ24 in | 2.0 | 8 (16 sq ft) | ~55 tiles |
| 18Γ18 in | 2.25 | 6 (13.5 sq ft) | ~49 tiles |
| 24Γ24 in | 4.0 | 4 (16 sq ft) | ~28 tiles |
| 4Γ16 in (subway) | 0.44 | 20 (8.9 sq ft) | ~250 tiles |
*Box sizes vary by manufacturer. Tile counts include 10% wastage.
Frequently Asked Questions
How much tile waste should I plan for?
Plan for 10% wastage for standard straight layouts. For diagonal or herringbone patterns, add 15-20%. Complex rooms with many corners or cuts may require up to 20% extra tiles.
How do I account for grout spacing?
Add the grout width to each tile dimension before calculating. Standard grout spacing is 1/8 inch for wall tiles and 1/4 inch for floor tiles. Rectified tiles can use as little as 1/16 inch.
How many 12Γ12 tiles for 100 sq ft?
Each 12Γ12 inch tile covers 1 square foot. For 100 sq ft, you need 100 tiles. With 10% wastage for cuts and breakage, buy 110 tiles (about 9 boxes of 12).
Should I buy extra tiles?
Always buy 10-15% extra tiles for cuts, breakage, and future repairs. Keep leftover tiles stored safely β tile batches may vary slightly in color, making future replacements difficult without matching tiles.
How many 12Γ24 tiles do I need for 200 sq ft?
Each 12Γ24 inch tile covers 2 square feet. For 200 sq ft, you need 100 tiles. With 10% wastage, buy 110 tiles. That's about 14 boxes (8 tiles per box).
How do I calculate tiles for a bathroom?
Calculate floor area (length Γ width) plus wall area if tiling walls. A standard 5Γ8 ft bathroom floor is 40 sq ft, needing about 44 tiles (12Γ12) with wastage. For walls, measure each wall's width Γ height and subtract doors/windows.
What size grout line should I use?
Use 1/16 to 1/8 inch for rectified (precision-cut) tiles, 1/8 inch for standard wall tiles, 1/4 inch for floor tiles, and 3/8 inch for natural stone. Larger grout lines are easier to keep even but require more grout.
How many tiles come in a box?
It varies by tile size: 12Γ12 tiles typically come 12-15 per box (12-15 sq ft), 12Γ24 tiles come 8-10 per box (16-20 sq ft), and 24Γ24 tiles come 4-6 per box (16-24 sq ft). Always check the box label for exact square footage.