Home & Construction

Grout Calculator

Estimate grout volume from tile size, joint width, joint depth and tiled area.

Free online toolWorks in your browserNo sign-up required

Grout Calculator

Enable JavaScript to use the interactive calculator; the example and formula are described below.

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How to use this grout calculator

Enter the values requested above and select Calculate. Change any input to compare another scenario. The calculation runs locally in your browser and does not require an account.

Formula and method

Approximate grout fraction is based on the joint cross-sectional area relative to a repeating tile module; the result is converted to volume.

Example

Narrow joints around large tiles use much less grout than wide joints around small tiles.

What this calculator is useful for

Estimate grout volume from tile size, joint width, joint depth and tiled area. The result is intended for quick estimates, checking arithmetic and comparing scenarios. When a result affects a contract, tax filing, medical decision, building-code requirement or other high-stakes situation, verify the result with the appropriate professional or authoritative source.

Grout Calculator: a practical example

A 200-square-foot tile job with 12-inch square tiles, 1/8-inch joints and 1/4-inch joint depth gives an estimated grout volume.

What the result means

Wider or deeper joints require more grout even if floor area stays the same.

Limits to consider

Tile edge profiles, actual joint depth, spillage, and manufacturer yields affect bag counts.

Related tools: Gravel Calculator · Lawn Size Calculator

Frequently asked questions

What does the Grout Calculator calculate?

Estimate grout volume from tile size, joint width, joint depth and tiled area.

How does the Grout Calculator work?

Approximate grout fraction is based on the joint cross-sectional area relative to a repeating tile module; the result is converted to volume.

Is the Grout Calculator free to use?

Yes. ERICH Calculators is free to use and does not require an account.

Transparency

Method, assumptions & corrections

See how formulas, sources and limitations are handled across ERICH Calculators.