Bathroom Tile Calculator
Your bathroom
Set 0 to tile the whole floor.
Floor tiles to buy
20 tiles
- Floor area
- 34 sq ft
- Wall area
- 92 sq ft
- Wall tiles to buy
- 825 tiles
- Total tiled area
- 126 sq ft
- Waste applied
- 12%
Doorway allowance of 3 linear ft is already removed from the wall perimeter.
Typical bathroom sizes and tile needed
| Bathroom | Size | Floor tile | 48 in wainscot | Full-height walls |
|---|---|---|---|---|
| Powder room | 3 x 6 ft | 18 sq ft | 60 sq ft | 120 sq ft |
| Small full bath | 5 x 8 ft | 40 sq ft | 92 sq ft | 184 sq ft |
| Standard bath | 6 x 9 ft | 54 sq ft | 108 sq ft | 216 sq ft |
| Primary bath | 10 x 12 ft | 120 sq ft | 164 sq ft | 328 sq ft |
Wall figures assume a doorway is deducted; add waste on top.
Bathroom tile and waterproofing supplies
Daltile Florentine 12" X 12" Glazed Porcelain Floor Tile in Carrara (13 PC Per Carton) (12.22 SQFT Per Carton)
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Nexus Self Adhesive 12-Inch Vinyl Floor Tiles, 20 Tiles, 12 x 12 in | Decorative Tile Format: Dimensional Tile Texture Adds Coordinated Finish Detail.
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Art3d 30-Pack Peel and Stick Vinyl Floor Planks, 12 x 12 in, Taupe Ash | Premium Vinyl, Self-Adhesive, Waterproof, Wood Grain, Fade-Resistant, Scratch-Proof, Ideal for Kitchen, Dining Room, Bedrooms
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Do this math on the job site — in the free app
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Tools the pros use for this job
Porcelain Floor Tile
Daltile Florentine 12" X 12" Glazed Porcelain Floor Tile in Carrara (13 PC Per Carton) (12.22 SQFT Per Carton)
Check price on AmazonWaterproof, hard-wearing and the only sensible choice for a bathroom floor.
Waterproofing Membrane
BXI Inorganic Ceramic Fiber Thermal Insulation Board(2732F) - 12'' X 8'' X 0.4'', Pack of 1 - High Density - Flame Retardant, Heat Resistant, High Temperature Insulation
Check price on AmazonAnywhere near a tub or shower, membrane goes down before tile.
Grout Sealer
AQUA-X 16 Oz. Grout Sealer, Clear Grout and Tile Sealer, Natural Finish, Professional Grade, Indoor & Outdoor, Fast Dry and Long Lasting Protection
Check price on AmazonBathroom grout without sealer stains within a year.
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How this calculator works
Floor tile = room length × width, minus the vanity footprint (most installers tile under a freestanding vanity but not a built-in one). Wall tile = wall perimeter × tile height, minus the doorway.
A standard 5 × 8 ft bathroom is 40 sq ft of floor. Tiling the walls to a 48" wainscot around a 23 ft perimeter adds about 92 sq ft — more than twice the floor. That is why wall tile budgets surprise people.
- Floor tile: 12x24 porcelain is the current default; smaller mosaic gives more grout lines and more slip resistance.
- Wall tile: 3x6 subway or 4x12 is standard; keep it lighter than the floor to make a small room feel bigger.
- Waste: use 12% in a bathroom rather than 10% — small rooms are almost all perimeter, so the cut ratio is high.
- Wet areas: the shower and tub surround need waterproofing behind the tile, not just cement board.
Next steps: price the job with the cost to tile a bathroom page, size the shower with the shower tile calculator, and measure up using how to measure for tile.
Frequently asked questions
How much tile do I need for a bathroom?
A standard 5x8 ft bathroom needs about 40 sq ft of floor tile, or 45 sq ft with waste. Adding a 48 inch wainscot around the walls adds roughly 90 sq ft more.
Do I tile under the vanity and toilet?
Always tile under the toilet — it is removed and reset anyway. Tile under a freestanding vanity; with a built-in vanity most installers tile up to the base to save material.
What size tile is best for a small bathroom?
Large format 12x24 on the floor reduces grout lines and makes a small room read bigger. Use mosaic only in the shower pan where slope and slip resistance matter.
How much waste should I add for a bathroom?
12%. Small rooms have a high perimeter-to-area ratio, so more of your tile ends up as cuts than in a big open floor.
Related calculators
- Shower Tile CalculatorWalls, floor, curb, and niche for a full shower surround.
- Floor Tile CalculatorTiles and boxes for any floor, by room dimensions and tile size.
- Wall Tile CalculatorWall coverage minus doors, windows, and other openings.
- Cost to Tile a Bathroom2026 bathroom floor, shower and full-room tiling costs.
Guides worth reading next
- How to Measure a Room for Tile (Step by Step)Measure any room for floor or wall tile: handle closets and alcoves, convert inches to decimals, subtract fixtures, and add the right waste percentage.
- Choosing the Right Tile Size for Your RoomHow tile size changes a room: when 12×24 beats 4×4, why small rooms can take large tile, grout line math, and the flatness rule for big formats.
- Sanded vs Unsanded vs Epoxy Grout: Which One Do You Need?Grout types explained by joint width and location: when sand scratches tile, why epoxy wins in showers, and how much of each type a bag actually covers.