Bathroom Floor Tile Calculator
Planning a bathroom floor tile project starts with knowing exactly how many tiles you need. Bathrooms present unique measurement challenges because they are often small, irregularly shaped, and packed with fixtures like toilets, vanities, and shower curbs that interrupt the tile field. Ordering the wrong quantity means either a stressful mid-project shortage or wasted money on excess material. This calculator is pre-set with a standard 5-by-8-foot bathroom footprint and 12×12-inch floor tiles in a straight grid layout, the most common combination for residential bathroom floors. Simply adjust the room dimensions and tile size to match your project, and the tool instantly calculates your total tile count with a 10-percent waste buffer. The visual preview shows your exact layout with full tiles in blue and cut tiles in red, so you can see at a glance how tiles will meet the walls and where you might adjust your starting position for a more symmetrical result. You can also switch patterns to brick offset, herringbone, or diagonal to compare how each layout affects the number of cuts and waste. For bathrooms with alcoves or L-shaped floor plans, use the advanced mode to build a multi-surface layout that handles the geometry for you.
Tile Calculator Input Form
Surface Dimensions
Range: 1 - 10000 in
Range: 1 - 10000 in
Tip: You can enter fractions like 3 1/2 or 1/4
Tile Dimensions
Range: 1 - 3000 in
Range: 1 - 3000 in
Tip: You can enter fractions like 3 1/2 or 1/4
Tile Pattern
Pattern Details
Offset every second row for a brick-like pattern
Classic
Yes
1:2
Tile Layout Preview
Tip: Drag the preview to adjust the tile starting position
- • Tests different tile positions to maximize complete tiles in view
- • Prioritizes showing more full, uncut tiles over minimizing total cuts
- • Automatically applies the best position if improvements are found
Add obstacles to mark areas where tiles won't be placed.
Calculation Results and Analysis
Results
Material Requirements
Frequently Asked Questions
- How many 12x12 tiles do I need for a small bathroom?
- A standard small bathroom is roughly 5×8 feet (40 square feet). Each 12×12-inch tile covers 1 square foot, so you need about 40 tiles plus 10% waste, totaling 44 tiles. Deduct tiles for the toilet footprint and vanity base if they sit on the subfloor rather than on the tile.
- Should I tile under the toilet and vanity?
- It is best practice to tile the entire floor before installing the toilet and vanity. This creates a cleaner finish, makes future fixture replacements easier, and prevents water damage to exposed subfloor. Only skip tiling under built-in cabinets that will never be moved.
- What tile size is best for a bathroom floor?
- For most bathrooms, 12×12-inch tiles strike the best balance between appearance and ease of installation. Smaller tiles (2×2 or 4×4 mosaic) provide more grip in wet areas like showers due to increased grout lines. Large-format tiles (12×24) work well in larger bathrooms but require a very flat subfloor.
- How do I handle the shower area when calculating bathroom floor tiles?
- Calculate the main bathroom floor and shower floor as separate surfaces. The shower typically uses smaller tiles for drainage slope, while the main floor uses standard tiles. Use the advanced multi-surface mode in this calculator to plan both areas together and get a combined material list.
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