12x24 Tile Calculator
Your room (12x24 tile)
Picking a pattern sets the recommended waste factor.
Check the box label — it varies by brand.
Tiles to buy
68 tiles
- Area to cover
- 120 sq ft
- Area including waste
- 134.4 sq ft
- Tile size
- 12 x 24 in
- One tile covers
- 2 sq ft
- Boxes needed
- 9 boxes
- Waste applied
- 12%
Tile is sold by the box — round up and keep one spare box from the same dye lot.
12x24 tile coverage chart
| Room area | Tiles (no waste) | Tiles +12% | Boxes (8/box) |
|---|---|---|---|
| 50 sq ft | 25 | 28 | 4 |
| 100 sq ft | 50 | 56 | 7 |
| 200 sq ft | 100 | 112 | 14 |
| 300 sq ft | 150 | 168 | 21 |
| 500 sq ft | 250 | 280 | 35 |
| 1,000 sq ft | 500 | 560 | 70 |
Offset patterns for plank tile
| Pattern | Offset | Lippage risk | Waste |
|---|---|---|---|
| Stacked / grid | 0% | Lowest | 10% |
| One-third offset | 33% | Low | 12% |
| Half brick bond | 50% | High — not recommended | 12% |
| Diagonal | 45° grid | Medium | 15% |
| Herringbone | n/a | Medium | 20% |
Leveling gear for 12x24 plank tile
DGSL Tile Leveling System with Plier, 300 Tile Spacers 1/8" and 100 Wedges | Tile Leveling Clips with Tile Plier, Anti Lippage Tile Leveler Spacers for Professional Ceramic Tile and Stone Installation
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DGSL 400PCS Tile Leveling System Tile Wedges for 1/8", 1/16", 1/32" Spacers | Tile Leveling Wedges for Most Sizes Tile Spacers and Tile Leveling clips, Tile Leveler Tools for Floor Tiles Installation
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DGSL Tile Leveling System with Plier, 600 Tile Spacers 1/8" and 200 Wedges | Tile Leveling Clips with Tile Plier, Anti Lippage Tile Leveler Spacers for Professional Ceramic Tile and Stone Installation
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Tile Leveling System 1000-Piece Tile Leveling Spacer Clips and 300-Piece Reusable Wedges Tile Leveler Tool Set for Ceramic Tile and Stone Installation (1/16 Inch)
Check price on AmazonDGSL Tile Leveling System with Plier, 300 Tile Spacers 1/16" and 100 Wedges | Tile Leveling Clips with Tile Plier, Anti Lippage Tile Leveler Spacers for Professional Ceramic Tile and Stone Installation
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Tile Leveling System Clips 1/16" Tile Leveler Clips 1.5mm 2000 Pcs DIY Tile Leveler Spacers for Professional Ceramic Tile and Stone Installation
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Do this math on the job site — in the free app
Smart Tile Calculator for Android: offline, in your pocket, no ads. iPhone version coming soon.
Tools the pros use for this job
Tile Leveling System
DGSL Tile Leveling System with Plier, 300 Tile Spacers 1/8" and 100 Wedges | Tile Leveling Clips with Tile Plier, Anti Lippage Tile Leveler Spacers for Professional Ceramic Tile and Stone Installation
Check price on AmazonPlank tile shows lippage instantly — clips and wedges hold neighbours flush while the mortar sets.
1/2 in Notched Trowel
Goldblatt 1/2'' x 1/2'' x 1/2'' Square-Notch Tile Trowel, 11'' x 4.5'' | Stainless Steel Blade, Soft Grip Handle, Square Notch Design for XLarge Ceramic Tile Floor, Pavers, EIFS
Check price on AmazonLarge format needs a deeper notch for 90%+ mortar coverage.
Tile Wet Saw
A 24 inch tile is too long to snap reliably — wet-cut it.
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How this calculator works
One 12x24 tile = 2 sq ft. Tiles needed = (area × waste factor) ÷ 2. A 12 ft × 15 ft room is 180 sq ft; at 10% waste that is 198 sq ft, or 99 tiles, or 13 boxes at 8 tiles per box.
The 33% offset rule. Never lay 12x24 in a 50% brick bond. Plank tiles have a slight crown in the middle, so a half offset puts the high point of one tile against the low corner of the next and you get lippage on every joint. Manufacturers and the TCNA recommend a maximum 33% offset — a third of the tile length — or a straight stack.
- Flatten the subfloor to 1/8" in 10 ft before you start.
- Back-butter each tile as well as combing the floor.
- Use leveling clips at every joint; they pay for themselves on the first row.
- Order 12% waste rather than 10% — a broken 2 sq ft tile costs twice as much.
Other sizes: 12x12, 24x24 and every size, or check tiles per square foot.
Frequently asked questions
How many 12x24 tiles do I need for 100 square feet?
50 tiles before waste. With 10% waste buy 55 tiles — 7 boxes at 8 tiles per box.
How many 12x24 tiles are in a box?
Typically 6 to 8 tiles, covering 12 to 16 square feet per box. Heavier porcelain often ships 6 to a box to keep box weight manageable.
Can I lay 12x24 tile in a 50% offset?
It is not recommended. Most manufacturers void warranty claims for lippage over a 33% offset on tiles longer than 15 inches. Use a one-third offset or stack the joints.
How much waste should I add for 12x24 tile?
12% for a straight or one-third offset layout, 15–18% for diagonal, and 20% for herringbone plank layouts.
Related calculators
- 12x12 Tile CalculatorTiles and boxes for 12-inch square tile, waste included.
- 24x24 & All-Size CalculatorEvery tracked tile size from 2x2 to 24x48 in one dropdown.
- Tile Pattern CalculatorHerringbone, chevron, hex, offset and diagonal waste factors.
- Tile Waste Factor GuideHow much extra tile to order, by pattern and room complexity.
Guides worth reading next
- How to Measure a Room for Tile (Step by Step)Measure any room for floor or wall tile: handle closets and alcoves, convert inches to decimals, subtract fixtures, and add the right waste percentage.
- Choosing the Right Tile Size for Your RoomHow tile size changes a room: when 12×24 beats 4×4, why small rooms can take large tile, grout line math, and the flatness rule for big formats.
- Sanded vs Unsanded vs Epoxy Grout: Which One Do You Need?Grout types explained by joint width and location: when sand scratches tile, why epoxy wins in showers, and how much of each type a bag actually covers.