Grout Estimate
Estimate the amount of grout needed for a tiled area.
About Grout Estimate
For square tiles, the total joint length per square foot is about 24 divided by the tile size in inches. Multiplying by joint width and depth gives grout volume, then weight. Grout is easy to underspecify on first tiling jobs, and running out mid-project stalls progress while the mix stays open only briefly.
Formula
Grout Estimate
Grout = joint length x joint width x depth; weight at ~90 lb/cu ft
- joint length
- Combined length of all grout lines
Worked example
With the default values below, Grout Estimate returns Total Joint Length of 300. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Tiled areaminimum 0 sq ft
- 150 sq ft
- Tile sizeminimum 0.01 inches
- 12 inches
- Grout joint widthminimum 0.01 inches
- 0.25 inches
- Grout joint depthminimum 0.01 inches
- 0.25 inches
Results
- Total Joint Length
- 300 ft
- Grout Volume
- 0.13 cu ft
- Grout Weight
- 11.7 lb
- 25 lb Bags
- 1
Step by step
- 1Values used
- 2Grout Estimate
- 3Total Joint Length= 300 ft
- 4Grout Volume= 0.13 cu ft
- 5Grout Weight= 11.7 lb
- 625 lb Bags= 1
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Grout Estimate calculated?
Grout = joint length x joint width x depth; weight at ~90 lb/cu ft For square tiles, the total joint length per square foot is about 24 divided by the tile size in inches. Multiplying by joint width and depth gives grout volume, then weight.
Why does Grout Estimate matter?
Grout is easy to underspecify on first tiling jobs, and running out mid-project stalls progress while the mix stays open only briefly.
What values do I need to enter?
This calculator takes 4 inputs: Tiled area, Tile size, Grout joint width, Grout joint depth. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.