Ribbon bar. Select the Statistics tab. In the Industrial Statistics group, click Six Sigma and on the Define submenu, select Six Sigma Calculator...

Classic menus. On the Statistics - Industrial Statistics & Six Sigma - Six Sigma (DMAIC) Shortcuts - Define submenu, select Six Sigma Calculator...

...to display the Six Sigma Calculator. The Six Sigma Calculator is an extension or special case of the Probability Calculator for the normal distribution; instead of the normal distribution z and p, the Six Sigma Calculator expects as input either Sigma or DPMO (defects per million opportunities), and will compute each quantity from the other.

See also, "Six Sigma" Methodology and STATISTICA.