Roman Numeral Converter — Roman numerals use seven symbols (I, V, X, L, C, D, M) to represent numbers from 1 to 3,999. They were used throughout the Roman Empire and remain common in clock faces, monarchs (Henry VIII), movie sequels (Rocky II), and Super Bowl branding.
Conversion runs in your browser.
Was Roman Numeral Converter useful?
¿Qué es Roman Numeral Converter?
Roman numerals use seven symbols (I, V, X, L, C, D, M) to represent numbers from 1 to 3,999. They were used throughout the Roman Empire and remain common in clock faces, monarchs (Henry VIII), movie sequels (Rocky II), and Super Bowl branding.
Enter a number to get its Roman form, or paste a Roman numeral to decode it back to an integer. Bidirectional conversion with input validation — invalid Roman forms are rejected with a clear error.
Cómo usarlo
-
Type a number
Any integer from 1 to 3,999.
-
Or type a Roman numeral
Lowercase works too — it is normalized to uppercase.
-
Read the result
The other side updates live as you type.
Ejemplos
1994 in Roman numerals
A classic year used in many textbooks.
Resultado: MCMXCIV
Decode MCMLXXXIV
1984 in canonical Roman form.
Resultado: 1984
Preguntas frecuentes
Guías relacionadas
Herramientas relacionadas
Unit Converter
Convert length, weight, temperature, area, volume, speed, time, and data units instantly.
Binary, Hex & Octal Converter
Convert numbers between binary, octal, decimal, and hexadecimal instantly.
JSON to YAML Converter
Convert JSON to clean YAML and decode YAML back to JSON. Round-trips common JSON shapes.
Last reviewed: 2026-09-25