Finishes
Tile Quantity Calculator
Enter the area to tile, the tile size, the grout joint and a waste allowance. You get the tile count, whole boxes to order and the tiles left over. Cuts at edges and trim pieces are what really drive waste, so treat the result as a planning figure and check it against your layout.
Result
Planning estimate- Tile plus joint area
- 147.016 sq in
- Tiles to cover the area
- 98
- Tiles with waste
- 108
- Boxes needed
- 11
- Tiles bought
- 110
- Extra tiles from full boxes
- 2
(Width + joint) times (height + joint).
Before waste.
10% waste added, rounded up. Cuts at edges and trim pieces drive real waste, so check your layout.
Rounded up to whole boxes.
Tiles bought less tiles with waste.
How it is calculated
- 1 Area of one tile plus its joint = (tile width + joint) x (tile height + joint), in square inches.
- 2 Tiles to cover the area = area in sq ft x 144 / area of one tile plus its joint.
- 3 Tiles with waste = tiles to cover the area x (1 + waste % / 100), rounded up.
- 4 Boxes needed = tiles with waste / tiles per box, rounded up. Tiles bought = boxes x tiles per box, and the extra from full boxes = tiles bought - tiles with waste.
Assumptions to confirm
- Grout joint
- 1/8 in (0.125 in) is an example. Use the joint your tile and layout call for. Wider joints mean fewer tiles for the same area.
- Waste allowance
- 10% is a common starting point. Small tiles, large-format tiles, diagonal layouts, patterns and rooms with many cuts usually need more. Confirm with the installer or manufacturer.
- Tiles per box
- 10 per box is only an example. Box counts vary by product and are on the label. Some products are sold by square foot, in which case convert to a tile count first.
- Trim and cuts
- Trim pieces, bullnose and edge cuts are not counted separately. Cut waste grows with the number of edges and openings, so a small or broken-up area usually wastes more than a large open one.
- Grout, thinset and substrate
- Grout, thinset, backer board and sealer are not calculated here. Grout coverage depends on the product and the tile thickness, so use the manufacturer's coverage chart.
This is an early planning estimate, not a quotation. Check quantities against your drawings, your specification and the manufacturer's data.
Questions about this calculator
How many tiles do I need for 100 sq ft?
It depends on the tile size. With 12 x 12 in tiles and a 1/8 in joint, about 98 tiles cover 100 sq ft, or 108 with 10% waste.
Why does the joint width matter?
Each tile takes up its own size plus one joint, so wider joints mean fewer tiles per square foot. On small tiles the effect is larger.
How much waste should I allow for tile?
Ten percent is a common starting point, but the right figure depends on the layout, tile size and number of cuts. Confirm it with your installer or the manufacturer.
Does this include grout?
No. Grout use depends on the product, joint width and tile thickness, so check the coverage chart from the grout manufacturer.
Take these numbers off the drawings
Estimateria reads the door, hardware and finish schedules out of your PDFs into a priced grid, so the quantities you check here start from the set instead of a retype.