Roman Numeral Converter
About Roman Numerals
Roman numerals are a numeral system that originated in ancient Rome. Numbers are represented by combinations of letters from the Latin alphabet.
Valid Roman numeral symbols: I (1), V (5), X (10), L (50), C (100), D (500), M (1000)
Extended notation: Use parentheses for thousands - (V) = 5,000, (X) = 10,000, (L) = 50,000, etc.
Date Converter
About Roman Dates
Romans had a complex calendar system involving Kalends, Nones, and Ides. This converter uses modern Gregorian dates represented with Roman numerals.
Choose a format: concise DD.MM.YYYY or a more descriptive Latin-inspired style.
Roman Numeral Calculator
How It Works
This calculator converts Roman numerals to decimal, performs the calculation, and then converts the result back to Roman numerals.
Note: Results are limited to positive integers between 1 and 3999. Division results are floored (integer part only).
Roman Numeral Clock
Roman Numeral Time
This live clock displays the current time using Roman numerals. The analog clock face uses traditional Roman numeral hours (I-XII), while the digital display shows hours, minutes, and seconds in Roman numeral format.
Fun fact: Many traditional clocks use IIII instead of IV for the number 4 to maintain visual balance with VIII on the opposite side!
Roman Numeral Reference
Basic Symbols
| Symbol | Value |
|---|---|
| I | 1 |
| V | 5 |
| X | 10 |
| L | 50 |
| C | 100 |
| D | 500 |
| M | 1000 |
Subtractive Notation
| Symbol | Value |
|---|---|
| IV | 4 (5-1) |
| IX | 9 (10-1) |
| XL | 40 (50-10) |
| XC | 90 (100-10) |
| CD | 400 (500-100) |
| CM | 900 (1000-100) |
Examples
| Number | Roman |
|---|---|
| 19 | XIX |
| 42 | XLII |
| 88 | LXXXVIII |
| 1994 | MCMXCIV |
| 2024 | MMXXIV |
| 3999 | MMMCMXCIX |