From what I can work out, this is how the currency works:
6 Piccioli = 1 Grano
30 Piccioli = 5 Grani = 1 Cinquina
60 Piccioli = 10 Grani = 2 Cinquina = 1 Carlino
120 Piccioli = 20 Grani = 4 Cinquina = 2 Carlino = 1 Tari
1440 Piccioli = 240 Grani = 48 Cinquina = 24 Carlino = 12 Tari = 1 Scudo
If I'm wrong and you know otherwise to be true, please feel free to let me know =]
My source for working out what I have is:
http://www.emmsaid.com/monetary_system.htm
I was just interested to see how many of you have coins of these types and how common/rare they actually are... I've added the Maltese Scudo to the coin database and added a picture of my own (quite worn) coin. if anyone has a better example please feel free to replace mine =]


https://en.numista.com/catalogue/pieces15808.html