Tile Calculator
A complete tile job requires tiles plus mortar, grout, and spacers. This calculator handles any tile size from 4×4 to 24×24 inches, accounts for grout joint width in tile count, and estimates 25lb grout bags and 50lb thinset bags. Add waste for cuts — use 10% for straight lay, 20% for diagonal.
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How to Use This Calculator
- 1Enter your measurements in the fields above. Use the units shown next to each field (ft, in, etc.).
- 2Click Calculate to get your material estimate instantly.
- 3Review the highlighted result — it shows the key quantity you need to order.
- 4Use Copy Results to save your estimate, or bookmark the URL — your inputs are encoded in the link.
Pro tip: Always add 10% to your material order to account for waste, cuts, and defects.
Frequently Asked Questions
How many 12×12 tiles do I need for a 10×8 bathroom?
A 10×8 bathroom is 80 sq ft. At 1 tile per sq ft (12×12 inch), you need 80 tiles plus 10% waste = 88 tiles. Add 4 bags of 25lb grout and 2 bags of 50lb thinset mortar.
How much thinset do I need per square foot?
A 50lb bag of thinset covers about 40–50 sq ft for standard floor tiles with a 3/16-inch notch trowel. Large-format tiles (18×18 and up) need a larger notch and reduce coverage to about 30 sq ft per bag.