Main Symbols
| Value | Roman numeral |
|---|---|
| 1 | I |
| 5 | V |
| 10 | X |
| 50 | L |
| 100 | C |
| 500 | D |
| 1,000 | M |
Common Values
| Number | Roman numeral |
|---|---|
| 1 | I |
| 4 | IV |
| 5 | V |
| 9 | IX |
| 10 | X |
| 20 | XX |
| 40 | XL |
| 50 | L |
| 90 | XC |
| 100 | C |
| 400 | CD |
| 500 | D |
| 900 | CM |
| 1,000 | M |
| 1,500 | MD |
| 1,900 | MCM |
| 2,000 | MM |
| 3,000 | MMM |
| 3,999 | MMMCMXCIX |
Reading Rules
- Normally add symbols from left to right.
- A smaller symbol before a larger one can indicate subtraction: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900.
- I is commonly placed before V or X; X before L or C; C before D or M.