How many tiles or boxes do you need? Calculate a wall, floor or backsplash from its dimensions or a known area. Add a cutting allowance, round up to whole boxes and estimate the tile cost.
How to use the tile calculator
- Enter the length and width of a floor, or the width and tiled height of a wall. Add more rectangles for other surfaces using the same tile. If you already know the area, select that option instead.
- Enter any area that will remain uncovered. The deduction is the total across the project, not an amount repeated for each surface.
- Enter the coverage printed on one box. If you do not have that information, choose tile size and enter the actual width, length and number of identical rectangular tiles per box.
- Set your cutting allowance, optional repair boxes and optional price per box. Select Calculate tiles. Check the whole-box order, coverage and cost.
You can use feet, inches, metres or centimetres for surfaces. Tile dimensions also support millimetres. Area values use square feet or square metres. Changing a unit converts existing values. Enter decimals with a point or comma, without fractions or thousands separators. For example, enter 8 ft 6 in as 8.5 ft or 102 in.
How many tiles do I need?
Start with the surface area, add a cutting allowance and round the result up to the packaging you can buy. Use the supplier's coverage per box whenever it is available.
- Total area = sum of length × width × quantity for each surface.
- Net area = total area − area left uncovered.
- Target coverage = net area × (1 + cutting allowance ÷ 100).
- Base boxes = target coverage ÷ coverage per box, rounded up.
- Boxes to buy = base boxes + extra repair boxes.
- Tile cost = boxes to buy × your price per box.
In tile-size mode, tile area = width × length. The calculator first rounds target coverage ÷ tile area up to a whole tile count, then rounds that count ÷ tiles per box up to whole boxes. The result is a quantity estimate by area. It is not a count of the individual cuts in your layout.
Example: a 3 m × 2.4 m floor
A rectangular floor measures 7.2 m². There are no deductions. With a 10% cutting allowance, target coverage is 7.92 m². Each box contains eight tiles measuring 30 × 60 cm, for a total of 1.44 m² per box.
- Tile count by area with allowance: 7.92 ÷ 0.18 = 44 tiles.
- Base boxes: 44 ÷ 8 = 5.5, rounded up to 6 boxes.
- Purchased tiles: 6 × 8 = 48 tiles, covering 8.64 m² by tile area.
- The 1.44 m² above the net floor area consists of 0.72 m² allowance and 0.72 m² from box rounding.
- At 32 per box, six boxes cost 192 in your chosen currency. One extra repair box would make the order seven boxes and the cost 224.
Load example fills the dimensions, tile size, packaging, 10% allowance and a price of EUR 32 per box. It uses no additional repair box. The example price is illustrative.
How to measure floors, walls and backsplashes
For a floor, measure the dimensions of the area you actually plan to tile. For a wall, use its width and the height up to the tile line. Add each wall separately. Divide an L-shaped floor into rectangles that do not overlap, then add them together. Check more than one point if the room is not square.
For a backsplash, measure each stretch separately. Include returns, niche sides and other surfaces that need tile as extra rectangles. A window opening can be subtracted if it is genuinely untiled, but its reveal may add tiled area. Keep a sketch so the same area is not counted twice.
Deducting an opening changes the area, but does not guarantee you can save a whole tile or reuse its offcut. A socket hole cut within one tile usually still needs that tile. Leave small cutouts in the area unless you have checked the cutting plan.
How much extra tile should I order?
The calculator starts at 10% for cutting and breakage so you can make an initial estimate. Change it to suit the actual project. There is no universal percentage that guarantees the right quantity. A simple layout with reusable offcuts can behave very differently from a diagonal pattern, herringbone, large tiles in a narrow space or a room with many corners.
For a difficult layout, ask the installer to count usable tiles and cuts before ordering. Do not assume an area allowance solves a layout problem. A small strip may still consume a full tile if the remaining piece cannot be reused.
Keep future repair stock separate from the cutting allowance. Daltile's FAQ recommends keeping extra matching tile for later repairs and explains that later batches may differ. Here you can add whole repair boxes after the main order has been rounded. They are not used to reduce the calculated cutting allowance.
Do I enter grout width?
No. This calculator does not model grout joints or the starting position of the layout. Tile-size mode divides the target area by the tile face area, without subtracting the space taken by grout. That can overstate a simple area count, but it can still understate a difficult cutting layout. Use the box's declared coverage when available and check the real layout before purchase.
The tool does not choose a grout joint, movement gap, adhesive or waterproofing system. Those depend on the tile and installation instructions.
Can I use it for peel-and-stick tiles or mosaic sheets?
Yes, as an area estimate using the manufacturer's installed coverage per box or pack. If sheets overlap or interlock, their outside width × height may overstate what they cover. Do not enter a rectangular bounding box for hexagons, irregular mosaics or mixed-size patterns. Use their stated pack coverage and an allowance appropriate to the layout.
Coverage mode reports boxes and area. It does not invent a piece count when the number and shape of pieces are unknown. For a pack sold as a single sheet, enter its installed coverage as the coverage of one pack.
What if tiles are sold individually?
For identical rectangular tiles, use tile-size mode and enter 1 as the number of tiles per box. Each purchase unit then means one tile, and the price per box field means the price of that tile. For irregular shapes sold individually, use coverage mode with the supplier's coverage of one piece.
Can I mix tile sizes, colours or products?
Run a separate calculation for each product. A mixed-size pattern needs the correct quantity of each format, not just enough total area. Marazzi provides a collection-specific pattern calculator for this kind of planning. Border tiles, trims, skirting pieces and decorative inserts also need their own counts.
What does the cost include?
The optional cost is the whole-box quantity multiplied by the price you enter. It does not add delivery, tax not already included in your price, labour, adhesive, grout, tools or preparation. Changing the currency changes the label only. It does not look up prices or exchange rates.
What should I check before buying?
Confirm the product's application, actual pack coverage, available batch and your installer's cutting plan. A quantity result does not confirm that a wall tile is suitable for a floor or that an adhesive product is suitable for a wet area. Daltile advises checking the manufacturer's recommended uses. Keep the product label and record the batch for future matching.
Plan the rest of your project
For painted surfaces, use the paint calculator. For walls covered in rolls, use the wallpaper calculator. For cabinet doors, use the furniture wrap calculator.
Product and planning references
See the Daltile tile FAQ, its wall tile guidance and the Marazzi pattern calculator. Product instructions and the actual layout determine the final order. The photograph is an illustration of tile planning, not a measured installation plan.
