Roman Numerals Converter
Convert between Roman numerals and decimal numbers
Decimal to Roman
Range: 1 - 3999
Roman Numeral
MMXXIV
Roman to Decimal
Decimal Number
2,024
Roman Numeral Symbols
I1
V5
X10
L50
C100
D500
M1000
Subtractive Combinations
IV= 4
IX= 9
XL= 40
XC= 90
CD= 400
CM= 900
Common Examples
| Decimal | Roman | Breakdown |
|---|---|---|
| 1 | I | 1 |
| 4 | IV | 5-1 |
| 9 | IX | 10-1 |
| 14 | XIV | 10+5-1 |
| 49 | XLIX | 50-10+10-1 |
| 99 | XCIX | 100-10+10-1 |
| 500 | D | 500 |
| 999 | CMXCIX | 1000-100+100-10+10-1 |
| 2024 | MMXXIV | 1000+1000+10+10+5-1 |
| 3999 | MMMCMXCIX | max value |
Roman Numeral Rules
- Symbols are added from left to right (XVI = 10+5+1 = 16)
- A smaller symbol before a larger one means subtraction (IV = 5-1 = 4)
- Only I, X, C can be subtracted (never V, L, D)
- I can only be subtracted from V and X
- X can only be subtracted from L and C
- C can only be subtracted from D and M
- Maximum representable value is 3999 (MMMCMXCIX)
- Zero has no Roman numeral representation
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