Tile Calculator
Estimate tiles, whole boxes and optional material cost for a rectangular floor, wall or backsplash.
Use calculatorQuestions & answers
Try an example — choose a starting point, then adjust the inputs.
How to calculate tiles and boxes
Tile area = Tile length (in) × Tile width (in) ÷ 144
Tiles = round up [Surface area × (1 + Allowance ÷ 100) ÷ Tile area]
Boxes = round up (Tiles ÷ Tiles per box)
Measure the area to cover, then use the dimensions and piece count for the tile you plan to buy. The optional cost multiplies whole boxes by your price per box. It does not use a national price estimate.
12x24 tile calculator example: a 100 sq ft floor
A 10 × 10 ft floor has 100 sq ft of area. A nominal 12 × 24 inch tile covers 2 sq ft, so the floor needs 50 tiles before cuts. With a 10% allowance, 110 ÷ 2 = 55 tiles. With an example pack of 8 tiles, round 55 ÷ 8 up to 7 boxes, providing 56 tiles. The example button loads these inputs; replace the pack size with your product's label.
Backsplash tile calculator example
An 8 ft long, 2 ft high backsplash covers 16 sq ft. A 3 × 6 inch tile covers 0.125 sq ft. Including 15% extra gives 18.4 ÷ 0.125 = 147.2, rounded to 148 tiles. An example box of 40 tiles means 4 boxes, or 160 tiles. For several sections, combine their measured areas before rounding the final order.
Tile area by nominal size
| Tile size | Area per tile | Tiles for 100 sq ft + 10% |
|---|---|---|
| 3 × 6 in | 0.125 sq ft | 880 |
| 12 × 12 in | 1 sq ft | 110 |
| 12 × 24 in | 2 sq ft | 55 |
| 18 × 18 in | 2.25 sq ft | 49 |
| 24 × 24 in | 4 sq ft | 28 |
Check the carton and layout before ordering
Box contents are product-specific. For example, this tile manufacturer's carton planning guide hosted by The Home Depot uses its own carton coverage and includes 10% overage. Do not transfer one product's box quantity to another tile.
This area-based estimate does not plan individual cuts, account for grout joints or optimize a diagonal pattern. Actual dimensions can differ from nominal sizes; compare against the carton coverage and confirm the layout with your installer. Mosaic sheets should be entered using sheet dimensions and sheets per box. Grout and adhesive are separate estimates.
Use the square footage calculator to measure your surfaces, or plan the room's walls with the paint calculator for two coats.