---
title: "Total depth: meaning in gemology"
description: "Total depth is the height of a stone from table to culet as a percentage of its average diameter. It equals crown height + girdle thickness + pavilion depth."
url: https://digitalgemology.com/learn/glossary/total-depth
image: https://digitalgemology.com/img/og-digital-gemology.png?v=d224fb01
---

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[Glossary](https://digitalgemology.com/learn/glossary) · Anatomy and proportions

# Total depth

Also called depth percentage, depth %

Total depth is the height of a stone from table to culet as a percentage of its average diameter. It equals crown height + girdle thickness + pavilion depth.

## In more detail

To check it, divide the depth in the measurements by the average diameter. GIA's Excellent range is 57.5 to 63%, and over 63% usually means extra weight below the face. For a fancy shape, depth is a percentage of the width.

## On a grading report

On the proportion diagram as "total depth". IGI's Ideal band is 58.5 to 62.5%.

## Related terms

- [Measurements](https://digitalgemology.com/learn/glossary/measurements): Measurements is the report line that gives a stone's size in millimeters. A round reads minimum – maximum diameter × depth, and a fancy shape length × width × depth.
- [Crown height](https://digitalgemology.com/learn/glossary/crown-height): Crown height is the height of the crown, from the girdle to the table. It is a percentage of the average diameter.
- [Pavilion depth](https://digitalgemology.com/learn/glossary/pavilion-depth): Pavilion depth is the depth of the pavilion, from the girdle to the culet. It is a percentage of the average diameter.
- [Girdle thickness](https://digitalgemology.com/learn/glossary/girdle-thickness): Girdle thickness is how thick the girdle is at its thinnest and thickest points. A report gives it as a range of words, such as "Thin to Medium".
- [Weight ratio](https://digitalgemology.com/learn/glossary/weight-ratio): Weight ratio is the part of GIA's cut grade that compares a diamond's weight with its diameter. A stone can carry too much or too little weight for its width.

## Learn more

- [Diamond measurements explained: diameter, depth and percentages](https://digitalgemology.com/learn/diamond-anatomy/diamond-measurements-explained)
- [How to read diamond proportions: decode a stone from its numbers](https://digitalgemology.com/learn/diamond-anatomy/how-to-read-diamond-proportions)
- [How to read a diamond grading report, start to finish](https://digitalgemology.com/learn/grading-reports/how-to-read-a-diamond-grading-report)
- [Bow-ties and grading reports: what the numbers can't tell you](https://digitalgemology.com/learn/bow-tie/bow-tie-and-the-grading-report)

[All 328 terms](https://digitalgemology.com/learn/glossary)