This service allows you to convert Roman numeral to Arabic numeral and vice versa.
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
If the option "Use lowercase letters for thousands" is checked, you can enter max 10011 Roman characters.
If the option "Use lowercase letters for thousands" is unchecked, you can enter max 100005 Roman characters.
Arabic numeral
The following digits are allowed for Arabic numerals:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
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.
| 1 | I |
| 2 | II |
| 3 | III |
| 4 | IV |
| 5 | V |
| 6 | VI |
| 7 | VII |
| 8 | VIII |
| 9 | IX |
| 10 | X |
| 50 | L |
| 100 | C |
| 500 | D |
| 1000 | M |
| 1000 | I |
| 5000 | V |
| 10000 | X |
| 50000 | L |
| 100000 | C |
| 500000 | D |
| 1000000 | M |
| Examples |
| 4 | IV |
| 8 | VIII |
| 30 | XXX |
| 40 | XL |
| 90 | XC |
| 104 | CIV |
| 400 | CD |
| 508 | DVIII |
| 1009 | MIX |
| 1970 | MCMLXX |
| 4850 | IVDCCCL
-- or --
MMMMDCCCL |
| 5710 | VDCCX
-- or --
MMMMMDCCX |
| 22850 | XXMMDCCCL
-- or --
MMMMMMMMMMMMM
MMMMMMMMMDCCCL |
| 95000 | XCV
-- or --
MMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMM |
Input Roman numeral to Arabic numeral converter and vice versa:
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Output Roman numeral to Arabic numeral converter and vice versa:
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