Tile & Grout Calculator
Estimate tiles, boxes and grout from room size, tile size, joint width and box yield.
Enter your project details
Each dimension can use its own unit—for example feet for length and inches for thickness. Package counts are rounded up.
Formula and calculation steps
Quantity = adjusted area ÷ product coverage; packages are rounded up.- Start with 120 ft² after openings.
- Add 10% allowance.
- Apply selected product coverage and round up.
Worked example
A 12 × 10 ft floor with 12 × 24 in tiles uses the tile dimensions—not a generic coverage assumption.
How to use this calculator
- Enter room length and width.
- Enter tile size, joint width and box yield.
- Add waste % for cuts and breakage.
Example: A 12 × 10 ft floor with 12 × 24 in tiles uses the tile dimensions—not a generic coverage assumption.
Questions about this calculator
Should I include waste for cuts?
Yes. Complex layouts and diagonal installs usually need more waste than a straight grid.
Is grout volume exact?
It is an estimate from joint width and tile size; buy a little extra and match the manufacturer’s coverage.
Can I use mixed units?
Yes. Choose feet, inches, metres or centimetres and the calculator converts each input before calculating.
Is this a final material order?
No. Confirm drawings, product coverage, local code and site conditions before buying or building.
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<iframe src="https://www.buildcalclab.com/embed/tile-calculator/?theme=light" width="100%" height="640" title="BuildWise calculator" style="border:0;max-width:720px"></iframe>Assumptions and references
Results are estimates based on the dimensions and values you enter. Verify final quantities, manufacturer coverage and site-specific requirements before ordering.
Last reviewed: July 2026 · Read our calculation methodology