The size of the table expressed as a percentage of the Average Girdle Diameter (or width on a fancy shape). This percentage is an indication of the quality of a diamond's cut.

Comparison of the size of the table facet to the width of the stone at the girdle. The width of the table divided by the average diametre.

The value which represents how the diameter of the table facet compares to the diameter of the entire diamond. So, a diamond with a 60% table has a table which is 60% as wide as the diamond's outline. For a round diamond, gemologists calculate table percentage by dividing the diameter of the table, which is measured in millimeters (this millimeter measurement does not appear on diamond grading reports) by the average girdle diameter (an average of the first two millimeter measurements on the top left-hand side of a diamond grading report). For a fancy shape diamond, table percentage is calculated by dividing the width of the table, at the widest part of the diamond, by the millimeter width of the entire stone (this total width measurement is the second of the three millimeter values in the top left-hand corner of the diamond grading report. Contrary to popular misconception, having a small table percentage (53% to 57%) does not make a round diamond any more brilliant than a diamond with a larger table.

The width of the table divided by the total diameter of the diamond. The table percentage is critical to creating sparkle in a diamond; a table percentage that is too low or too high will cause a diamond to lack sparkle.

The diameter of the gemstone divided by the size of the table.

The width of the table divided by the diameter of the diamond. The table percentage is one of the many metrics used to measure how well proportioned a diamond is cut, and consequently how much "sparkle" it will have.

The size of the table of a cut gemstone in proportion to the girdle obtained by dividing the table width by the girdle width