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	D	ↀ	ↁ	ↂ	ↇ	ↈ
Apostrophus	|Ɔ	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.