The mean geometric chord is also widely known as the Mean Aerodynamic Chord. It is the chord of an equivalent untwisted, unswept and non-tapered lifting surface, for which the total lift and pitching moment are essentially equal to the lift and pitching moment on the actual lifting surface.
For general planform, the mean geometric chord can be determined from:
In the software, the equation for a straight-tapered lifting surface is used:
See Graphic