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Bathroom Tile Cost Calculator
Your bathroom
Tiles are sold whole, so the calculator rounds up to full tiles. The waste allowance covers cuts around the tub, toilet and vanity — use 10% for straight layouts and 15% for diagonal patterns.
Example: a 10 × 10 ft bathroom (100 sq ft) with 12 × 12 in tiles at $3.50 per sq ft and 10% waste → 110 tiles, about $385.
Behind the numbers
How bathroom tile cost is calculated
Multiply the room length by the width to get the floor area, then add the waste allowance for cuts. Divide that by the area of one tile to get the number of tiles, rounding up because tiles are sold whole. Multiply the tiles by the area of one tile and the price per square foot for the total cost.
Total cost = tiles needed × tile area × price per sq ft. Worked example: 10 ft × 10 ft = 100 sq ft; 100 × 1.10 = 110 sq ft to buy; 110 ÷ 1.00 sq ft per tile = 110 tiles; 110 × 1.00 × $3.50 = $385.
Area of common tile sizes
Tile area = width × length ÷ 144. An 8 × 48 in plank tile covers 384 ÷ 144 = 2.67 sq ft.
Examples
Example bathroom tile costs
| Room | Tile size | Price / sq ft | Waste | Tiles | Total cost |
|---|---|---|---|---|---|
| 100 sq ft | 12 × 12 in | $3.50 | 10% | 110 | $385 |
| 60 sq ft | 6 × 6 in | $5.00 | 10% | 264 | $330 |
| 150 sq ft | 24 × 24 in | $4.00 | 15% | 44 | $704 |
| 80 sq ft | 12 × 24 in | $6.00 | 10% | 44 | $528 |
| 120 sq ft | 18 × 18 in | $2.75 | 10% | 59 | $365.06 |
Tips before you buy
Measure the room at its longest and widest points, and add any alcoves or the shower floor separately — an L-shaped bathroom measured as one big rectangle overbuys tile.
Use 10% waste for straight layouts and 15% for diagonal patterns or rooms with lots of cuts around fixtures.
Buy one extra box beyond the calculated amount if the tile is a closeout or a limited dye lot — matching it later is often impossible.
The price per square foot is for tile only. Thinset, grout, backer board and labor are usually quoted separately, so budget for those on top.
Good to know
Frequently asked questions
How many extra tiles should I buy?
Add 10% waste for a straight layout and 15% for a diagonal pattern or a room with many cuts. For the example on this page, 100 sq ft at 10% waste means buying 110 sq ft of tile, or 110 tiles at 12 by 12 inches.
Should I count the floor under the tub or vanity?
Count the full floor if the tile runs underneath, and subtract it if the tub or vanity sits on the subfloor and the tile stops at its edge. Measure only the area you will actually tile.
What if my tile size is not in the list?
Choose “Add your own tile size…” and type your tile name plus its width and length in inches into the fields that appear. The calculator uses your size straight away — for example, an 8 by 48 in plank covers 2.67 sq ft.
Does the price include installation?
No. This calculator covers the tile material only, at the price per square foot you enter. Thinset, grout, backer board, waterproofing and labor are separate, and professional installation often costs as much as the tile itself.