How the conversion works
Roman numerals are built by greedily subtracting the largest matching value-symbol pair, including the six subtractive pairs (CM, CD, XC, XL, IX, IV) that avoid four repeated symbols in a row.
- M — 1000
- D — 500
- C — 100
- L — 50
- X — 10
- V — 5
- I — 1
Common values
| Number | Roman numeral |
|---|---|
| 200 | CC |
| 510 | DX |
| 1,000 | M |
| 2,024 | MMXXIV |
| 3,000 | MMM |
More detail
Why subtractive pairs exist
Writing 4 as IIII would repeat a symbol four times, so Roman notation uses IV (5 − 1) instead. The same rule gives IX for 9, XL for 40, XC for 90, CD for 400, and CM for 900 — each one symbol short of the next landmark value.
Quick check. 2024 is MMXXIV: two M's for 2000, XX for 20, and IV for 4.
Frequently asked questions
How do you write 2024 in Roman numerals?
2024 is MMXXIV: two M's for 2000, XX for 20, and IV for 4 (5 − 1). Enter 2024 above to confirm.
What's the largest number Roman numerals can represent?
Standard Roman numerals go up to 3999 (MMMCMXCIX). Beyond that you'd need a repeated fourth M, which isn't allowed in standard notation — this converter shows "—" for anything outside 1–3999.
Why is 4 written as IV instead of IIII?
Roman notation avoids repeating a symbol four times in a row, so 4 uses the subtractive pair IV (5 − 1) instead of IIII. The same rule gives IX for 9, XL for 40, XC for 90, CD for 400, and CM for 900.
How do you write 49 in Roman numerals?
49 is XLIX: XL for 40 (50 − 10) and IX for 9 (10 − 1). Enter 49 above to see it computed.