How this calculator works
Estimate grout volume using tile dimensions, joint width and tile thickness. Because grout density and coverage vary by product, the result is shown as approximate volume and should be checked against the manufacturer chart.
Approximate joint volume is derived from joint width × depth × total joint length per tiled area, then increased by waste.
Example
Narrow joints around large-format tile use far less grout than wide joints around small mosaic tile.
How to get a better estimate
- Use the grout manufacturer coverage chart for final purchasing.
- Joint depth is often close to tile thickness but installation conditions vary.
- Mosaics create much more joint length per square foot.
What the result means
The result is a planning estimate. Dimensions, coverage, density, packaging and installation conditions vary by product and project. For purchasing, compare the result with the exact product label or supplier specification. For structural, electrical, code-regulated or safety-critical work, use an appropriately qualified professional.
Common questions about the Grout Calculator
What does this calculator estimate?
Estimate grout volume using tile dimensions, joint width and tile thickness. Because grout density and coverage vary by product, the result is shown as approximate volume and should be checked against the manufacturer chart.
What formula does it use?
Approximate joint volume is derived from joint width × depth × total joint length per tiled area, then increased by waste.
How should I use the result?
Use it as a planning estimate, then verify the dimensions and replace editable defaults with the specifications for the product or service you actually intend to buy.
Reference tables
Want a fast benchmark without changing inputs? These static tables use the same published calculation method.