GUC converts any units of measurement written by the user following the syntax described in the app help documentation, which is highly recommended to be read first.

Compared to other apps, GUC is not limited to a predefined set of units. Instead, it offers the freedom of converting simple or very complex units.

Note that multiples and submultiples are specified using '_'. For example, millimeter (mm), kilogram (kg) etc. must be written as m_m and k_g, respectively.