Grout Calculator
Estimate grout weight for a tiled area, with a waste allowance.
Quick answer: enter your details below and click Calculate Grout — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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How to use
- Measure the tiled area in square metres.
- Enter the coverage per kilogram from the grout packaging.
- Click Calculate Grout.
About this tool
Enter the tiled area and the coverage of one kilogram of grout, and the tool adds a 10 percent allowance for waste and spills before rounding up to whole kilograms. The allowance is shown separately.
Frequently asked questions
Can I mix a partial bag later?
Yes, but matching colour across batches can be tricky, so buy the full need in one batch where possible.
What if joints are wide?
Wide joints use more grout, so the coverage per kilogram will be lower; use the packaging figure for your joint width.