Roman Numeral Converter
Convert numbers between standard Arabic (Decimal) numerals and Roman numerals (I, V, X, L, C, D, M).
🔢 Arabic (Decimal) to Roman
I
🏛️ Roman to Arabic (Decimal)
1
Roman Numeral Value Reference
| Symbol | Value | Symbol | Value |
|---|---|---|---|
| I | 1 | L | 50 |
| V | 5 | C | 100 |
| X | 10 | D | 500 |
| M | 1000 |
What Are Roman Numerals?
Roman numerals are an ancient numbering system that originated in Rome. They are based on seven symbols: I, V, X, L, C, D, and M. The system relies on addition and subtraction rules to represent numbers. For example, IV is 4 (5 - 1), while VI is 6 (5 + 1).
How Subtraction Works:
- ✔ **I** can be placed before V (5) and X (10) to make 4 (IV) and 9 (IX).
- ✔ **X** can be placed before L (50) and C (100) to make 40 (XL) and 90 (XC).
- ✔ **C** can be placed before D (500) and M (1000) to make 400 (CD) and 900 (CM).
Common Uses Today
- ✔ **Dates:** Used for copyright dates on films and monuments (e.g., MCMXCIV for 1994).
- ✔ **Outlines:** Used for primary headings in academic outlines.
- ✔ **Clocks:** Often used on traditional clock faces.
- ✔ **Succession:** Used to number successive individuals or events (e.g., Super Bowl LIX).