Roman numeral to Arabic numeral converter and vice versa help


Settings Remark
Enter Roman or Arabic numeral Roman numeral
The following characters are allowed for Roman numerals:
I, V, X, L, C, D, M

To enter multiplication by 1000 represented by I, V, X, L, C, M, you can use lowercase letters:
i, v, x, l, c, d, m

Roman numeral examples:
MCMXLV
mmmmmmmmmdlxviiDCCCLVI


If the option "Use lowercase letters for thousands" is checked, you can enter max 10011 characters.

If the option "Use lowercase letters for thousands" is unchecked, you can enter max 100005 characters.

Arabic numeral
The following digits are allowed for Arabic numerals:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9

Arabic numeral examples:
1934
2008


If the option "Use lowercase letters for thousands" is checked, you can enter max 10 digits.

If the option "Use lowercase letters for thousands" is unchecked, you can enter max 8 digits.