Explained with a place-value breakdown — symbol reference, charts, and a live converter.
XC in numbers is 90.
Symbols in sequence:
XC
90 = 90
| Symbol | Value (Arabic) |
|---|---|
| I | 1 |
| V | 5 |
| X | 10 |
| L | 50 |
| C | 100 |
| D | 500 |
| M | 1,000 |
1–10
| Arabic | Roman |
|---|---|
| 1 | I |
| 2 | II |
| 3 | III |
| 4 | IV |
| 5 | V |
| 6 | VI |
| 7 | VII |
| 8 | VIII |
| 9 | IX |
| 10 | X |
Tens (10–100)
| Arabic | Roman |
|---|---|
| 10 | X |
| 20 | XX |
| 30 | XXX |
| 40 | XL |
| 50 | L |
| 60 | LX |
| 70 | LXX |
| 80 | LXXX |
| 90 | XC |
| 100 | C |
Hundreds (100–1000)
| Arabic | Roman |
|---|---|
| 100 | C |
| 200 | CC |
| 300 | CCC |
| 400 | CD |
| 500 | D |
| 600 | DC |
| 700 | DCC |
| 800 | DCCC |
| 900 | CM |
| 1,000 | M |
Thousands (1000–3000)
| Arabic | Roman |
|---|---|
| 1,000 | M |
| 1,500 | MD |
| 2,000 | MM |
| 2,500 | MMD |
| 3,000 | MMM |
| 3,500 | MMMD |
| 3,999 | MMMCMXCIX |
Roman numerals were developed in ancient Rome and are still seen today on clocks, monuments, film titles, and chapter numbers. The system uses seven symbols and a subtractive principle: when a smaller symbol precedes a larger one (e.g. IV instead of IIII), it is subtracted.
The six subtractive pairs are IV (4), IX (9), XL (40), XC (90), CD (400), and CM (900). All other symbols are additive. This allows every number from 1 to 3,999 to be represented unambiguously.
On clock faces (often with IIII instead of IV), for numbering popes and monarchs (Charles V, Pope Francis I), in film opening credits for the production year, as chapter numbers in books, and as year inscriptions on buildings.
XC in numbers is 90.
Read XC left to right and add the symbol values. When a smaller symbol appears before a larger one (e.g. IV), subtract the smaller value. That gives 90.
The seven base symbols are I (1), V (5), X (10), L (50), C (100), D (500), and M (1,000). Combining these symbols represents every number from 1 to 3,999.
The classical system has no symbol for zero — it was a counting system representing quantities, not the mathematical concept of zero. The largest representable number is 3,999 (MMMCMXCIX); larger numbers historically used overlines, which are not part of the standard system used here.
Yes. Converting between Arabic and Roman numerals is pure integer math and perfectly exact — the same value, just written a different way.
Convert more
The Roman numerals converter covers all numbers from 1 to 3,999 with a full breakdown.