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Convert between Roman numerals and Arabic numbers from 1 to 3999 with a live symbol-by-symbol breakdown.
Whole numbers from 1 to 3999.
Letter case is ignored and only canonical numerals are accepted.
MCMXCIV
Symbol breakdown
| Piece | Value |
|---|---|
| M | 1000 |
| CM | 900 |
| XC | 90 |
| IV | 4 |
| MCMXCIV | Total: 1994 |
| Symbol | Value | Note |
|---|---|---|
| I | 1 | Base unit, repeated up to three times (II, III). |
| V | 5 | Never repeated; IV is 4 and VI is 6. |
| X | 10 | Placed before L or C to form XL (40) and XC (90). |
| L | 50 | Never repeated; LX is 60 and XL is 40. |
| C | 100 | Placed before D or M to form CD (400) and CM (900). |
| D | 500 | Never repeated; DC is 600 and CD is 400. |
| M | 1000 | Largest classic symbol; MMM (3000) is the maximum. |
What
Roman numerals are a numeral system that combines seven letters (I, V, X, L, C, D, M) using additive and subtractive rules. This converter translates values from 1 to 3999 in both directions and shows how each symbol contributes to the total.
Cases
Decode copyright years and chapter numbers while reading documents.
Generate Roman numerals for outline headings and legal clause numbering.
Verify test fixtures while implementing your own converter function.
Check whether a numeral on a clock face or monument is canonical.
Convert edition labels such as Super Bowl or Olympiad numbers.
Teach additive and subtractive notation with a live breakdown table.
How To
Type a number or a numeral and read the converted value instantly.
Type into the number field to get a numeral, or into the numeral field to get a number.
Numbers must be whole and between 1 and 3999; numerals can be typed in any letter case.
Check the table to see which additive and subtractive pieces make up the result.
Use the copy button to paste the converted value into your code or document.
Knowledge
FAQ