Quick answer
Estimate bathroom floor or wall tile quantity with measured surface area, tile size, waste allowance and box coverage. Use the working RenoMetric calculator below for the actual estimate, then use this page to check assumptions, package rounding and project-specific considerations.
Open the working Tile calculator
Formula
Worked planning example
A 5 × 8 ft bathroom floor is 40 ft². With 12% waste, plan for about 44.8 ft² before box rounding.
Common uses
- Bathroom floors
- Shower walls
- Tub surrounds
- Accent walls
How to get a better estimate
Measure the actual project rather than relying on listing dimensions. For irregular spaces, split the surface into simple measurable sections and add the results. Use the exact product label for package coverage, yield, density or square-foot coverage whenever it is available.
Keep waste and package rounding as separate steps. Waste covers cuts, breakage, pattern matching and unavoidable offcuts. Package rounding reflects the fact that many materials are sold only in complete bags, boxes, bundles or cans.
Before you buy: this page is a planning guide, not a contractor quotation or structural design. Verify final quantities with the product manufacturer, supplier or installer when project conditions could materially change the result.
Bathroom Tile Calculator FAQ
Should I subtract the vanity?
Subtract only areas that definitely will not receive tile. For uncertain layouts, keeping a small reserve is safer.
How much tile waste is typical?
Simple straight layouts may use around 10%, while diagonal patterns, niches and many cuts can require more.
Can I calculate shower walls too?
Yes. Measure each tiled wall separately and subtract large untiled openings only when appropriate.