Tile Grout Estimator
Estimate grout mass using tile dimensions, joint width and depth, tiled area, grout density and a waste allowance.
How to use this calculator
- Enter tile dimensions, area, joint size, density and allowance. Check the grout packaging yield before purchase.
- Check the labels and units before using a result outside this page.
- Change one input at a time if you want to compare scenarios.
Formula and method
Approximate joint volume per area ≈ ((tile length + tile width)/(tile length × tile width)) × joint width × joint depth
- Approximate joint volume per area ≈ ((tile length + tile width)/(tile length × tile width)) × joint width × joint depth
- This is a planning estimate; tile lippage, edge shape, joint profile and manufacturer yield tables affect actual consumption.
Worked examples
Worked example
For 300 mm square tiles with 3 mm joints and 8 mm depth, estimate grout use per square metre before adding waste.
Joint geometry is converted to an approximate volume per m² and multiplied by grout density and total area.
Joint geometry is converted to an approximate volume per m² and multiplied by grout density and total area.
Understanding the result
Estimate grout mass using tile dimensions, joint width and depth, tiled area, grout density and a waste allowance.
This is a planning estimate; tile lippage, edge shape, joint profile and manufacturer yield tables affect actual consumption.
Important notes
This is a planning estimate; tile lippage, edge shape, joint profile and manufacturer yield tables affect actual consumption.
Displayed outputs are rounded for readability; preserve full precision when continuing a calculation.
Frequently asked questions
What does this grout estimator calculator show?
Estimate grout mass using tile dimensions, joint width and depth, tiled area, grout density and a waste allowance.
Which inputs should I check first?
Enter tile dimensions, area, joint size, density and allowance. Check the grout packaging yield before purchase.
Can the result be used as a final professional specification?
This is a planning estimate; tile lippage, edge shape, joint profile and manufacturer yield tables affect actual consumption.
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Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.