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.
Save this calculation in the free app
Smart Tile Calculator keeps your tile jobs on your phone, offline. On iPhone? It's inside Roofing Calculator & Estimator.
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
Smart Squares Easy Street Plush Carpet Tiles (Sample, 487 Porcelain) | Made in the USA, Premium 18x18 Peel and Stick Floor Tiles with Attached Padding – Seamless DIY Carpet Squares
$8.97
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Tile Leveling Compounds System Plier Hand Floor Pliers Tiling Installation Locator Leveling System for DIY Ceramic Stone Wall Tile Spacers Adjustment yellow
$13.99
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Drydiet 108 Sqft Uncoupling Membrane for Tile 1/8''(3mm), Orange | 3.28 x 32.8 FT Waterproofing Uncoupling Membrane Roll, Anti-Fracture Flooring Underlayment for Shower Bathroom Kitchen
$134.99
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Nuanchu Tile Leveling System Kit 200 Reusable Tile Spacers + 200 1/16'' Replaceable Spare Steel T-pin, Leveling Clips Fit 8-12mm Floor Compounds Set for Wall & Floor (Yellow)
$32.99
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Prices as of Oct 17, 2026, 4:39 AM UTC. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Tools the pros use for this job
Porcelain Floor Tile
Smart Squares Easy Street Plush Carpet Tiles (Sample, 487 Porcelain) | Made in the USA, Premium 18x18 Peel and Stick Floor Tiles with Attached Padding – Seamless DIY Carpet Squares
$8.97
Check price on AmazonWaterproof, hard-wearing and the only sensible choice for a bathroom floor.
Waterproofing Membrane
Hard-to-Find Fastener Phillips Self-Piercing Cement Board Screws, Durable Steel Hardware Fasteners for Home Improvement, DIY, Construction, 8 x 1-1/4, Pack of 168
$11.11
Check price on AmazonAnywhere near a tub or shower, membrane goes down before tile.
Grout Sealer
Miracle Sealants 511 Impregnator Penetrating Stone & Tile Sealer, Pint | Penetrating sealer for no-sheen stain, water & oil protection for granite, stone, tile, masonry & grout. Dries invisible.
$18.75
Check price on AmazonBathroom grout without sealer stains within a year.
As an Amazon Associate I earn from qualifying purchases.
Prices as of Oct 17, 2026, 4:39 AM UTC. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Choosing a grout sealer? See our grout sealer buying guide.
Tiling a shower? See our shower waterproofing buying guide.
Do this math on the job site — in the free app
Smart Tile Calculator for Android: offline, in your pocket, free.
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.
- Tile Baseboard CalculatorLinear feet of tile base, pieces to buy, or floor tiles to cut into strips.
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.