Roman numbers

A quick reference to roman numbers, aka roman numerals.

Numeral I V X L C D M
Number 1 5 10 50 100 500 1,000

Larger numbers

Special characters for larger numbers:

Numeral
Apostrophus C|Ɔ |ƆƆ CC|ƆƆ |ƆƆƆ CCC|ƆƆƆ
Number 500 1,000 5,000 10,000 50,000 100,000

In addtion to this there is the "Vinculum" notation. By adding a line over the numeral, the number is multiplied by 1,000. Like this example:

V = 5,000

Fractions of 12

Fractions of 12 were used eg. for coins. These have a special notation:

Fraction Numeral Alt. Fraction Numeral Alt.
1/12 7/12 S•
2/12 •• : 8/12 S•• S:
3/12 ••• 9/12 S••• S∴
4/12 •••• :: 10/12 S•••• S::
5/12 ••••• 11/12 S••••• S⁙
6/12 S 12/12 I

More

And there's more still. Please see Wikipedia as this page is intended to be a quick reference only.