Quadrilateral cell aspect ratio is computed from the ratio of the average length and average width. The aspect ratio is always greater than or equal to 1 with a value of 1 representing a square.

Hexahedral cell aspect ratio is computed from the ratio of the maximum of the length, width, and height and the minimum of the length, width, and height. The aspect ratio is always greater than or equal to 1 with a value of 1 representing a cube.

Triangular cell aspect ratio is computed as the long edge of the triangle divided by the short edge.

Tetrahedral cell aspect ratio is computed as the ratio of the radius of the cell's circumscribing sphere to 3 times the radius of the inscribed sphere. Prism aspect ratio is the ratio of the average height of the prism and the average length of the base's (triangle) edges. The aspect ratio of a prism can be less than 1.

Pyramid aspect ratio is the ratio of the height of the pyramid and the average length of the base's (quadrilateral) edges. The aspect ratio of a pyramid can be less than1.

**Note:** Use the *Maximum Included Angle* function rather than *Aspect Ratio* for examining grids that contain anisotropic
cells. Such cells are usually long and slim so they may have high aspect ratios.