Convert from crith to grano, grani [Italy]

Unit Definition (crith)
The crith is a unit of mass sometimes used in the physics and chemistry of gases. The crith is equal to the mass of a liter of hydrogen at standard temperature (0.01°C) and pressure (1 atmosphere); this is about 89.885 milligrams. The name comes from an ancient Greek word for a barleycorn.

Unit Definition (grano, grani [Italy])
The grano, grani [Italy] is a traditional Italian weight unit, varying in size but typically about 50 milligrams. The plural is grani.