Convert from grano, grani [Italy] to onca [Portuguese]

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.

Unit Definition (onca [Portuguese])
The onça, once, oncia, onza is traditional names for the ounce unit in Romance languages. The Portuguese onça and Spanish onza equal 1/16 libra or about 28.69 grams (1.012 ounce).