How Many Tiles for an 8x10 Bathroom Floor? (2026 Guide)
An 8x10 ft (80 sq ft) bathroom floor takes about 80 net 12×12 in tiles — buy 88 with 10% for cuts and waste. 12×24 in: 40 net, buy 44. 8×8 in: about 181 net, buy 200.
Tile counts for an 8x10 ft bathroom floor at a glance
An 8×10 ft master bath with a tub and shower measures 80 sq ft of floor inside the walls. The table assumes that full 80 sq ft: each net number is 80 divided by the tile's square footage, and the buy column adds 10% for cuts at the toilet, vanity, doorways and tub edges.
| Tile size | Sq ft per tile | Net tiles for 80 sq ft | Buy with 10% extra |
|---|---|---|---|
| 8×8 in | 0.444 | 181 | 200 |
| 12×12 in | 1.00 | 80 | 88 |
| 12×24 in | 2.00 | 40 | 44 |
| 24×24 in | 4.00 | 20 | 22 |
8×8 in is the one that needs rounding: 80 ÷ 0.444 = 180.2, so you need 181 whole tiles before overage. A smaller room scales the same way — see the counts for a 5×7 ft bathroom floor or a 3×5 ft bathroom floor.
Worked example: 80 sq ft in 12×12 in tile
Say the floor is exactly 8×10 ft = 80 sq ft. A 12×12 in tile covers 1.00 sq ft, so the open area divides cleanly: 80 ÷ 1.00 = 80 tiles. That is the net count for a clean rectangle.
Real bathrooms are not clean rectangles. The toilet flange, the vanity toe-kick and the doorway each force partial tiles, and cutting around the toilet base can waste most of a tile if the cut goes wrong. Adding 10% gives 80 × 1.1 = 88 tiles to buy, which covers layout shifts and one or two bad cuts.
If the tub or shower base is already installed, the starting number changes — tile never runs underneath it. A 5×3 ft tub footprint is 15 sq ft, leaving 80 − 15 = 65 sq ft of floor to tile. Scale the order to the net area: 65 tiles in 12×12 in, buy 72 (65 × 1.1 = 71.5, rounded up).
Measure wall to wall with the fixtures in place, subtract the tub and shower footprints, then let the tile calculator turn your numbers into boxes. For other layouts the math is identical — check the tiles per square foot reference for any room size.
Measure the net floor first, then prep
- Deduct the tub and shower bases before you count. An installed tub or shower pan sits on the subfloor and is not tiled underneath. Measure the exposed floor instead of the full 80 sq ft — after a 5×3 ft tub, that's about 65 sq ft to tile, so the 12×12 order drops to about 65 net (buy 72).
- Pick a slip-resistant finish for a wet room. A master bath gets wet feet and soap film, so choose a matte or textured tile with a good coefficient of friction; large polished porcelain looks sleek but gets slippery when wet.
- Leave the grout joints the tile calls for. Small formats usually take 1/8–3/16 in joints and large-format rectified tile runs tighter, near 1/8 in. Joint width affects the layout, not the tile count — the 10% overage covers the partial tiles at walls and fixtures.
FAQ
How many 12×12 tiles do I need for an 8×10 bathroom floor?
About 80 net — buy 88. An 8×10 ft floor is 80 sq ft and each 12×12 in tile covers 1.00 sq ft, so 80 ÷ 1.00 = 80 tiles covers the open floor. The extra 10% (8 tiles) absorbs cuts around the toilet base, vanity and doorways. If you deduct the tub footprint first, start from the smaller net area instead.
Should I subtract the tub area when tiling a master bath floor?
Yes — tile only the floor you walk on. An installed tub or shower base sits on the subfloor and is never tiled underneath, so measure the exposed floor rather than the full room footprint. In an 8×10 ft bath with a 5×3 ft tub, that deducts 15 sq ft and leaves about 65 sq ft to tile: about 65 tiles in 12×12 in, buy 72.
Are 24×24 large-format tiles a good choice for a master bath?
They can be, if the floor is flat. 80 sq ft ÷ 4.00 sq ft per tile = 20 tiles net (buy 22), with far fewer grout lines and a cleaner look. The catch: large-format tile bridges low spots instead of following them, so the subfloor must be dead flat to avoid lippage, and wet areas still need a proper slope toward the drain.
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