⚡ Utility → Roman Numeral Converter
🏛️
Roman Numeral Converter
Convert any number to Roman numerals and back instantly. Supports 1 to 3,999.

// Convert

Roman Numeral
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// Reference Chart
I
1
V
5
X
10
L
50
C
100
D
500
M
1000
MMXXVI
2026

What is this Tool?

The Roman Numeral Converter translates between standard Arabic numbers and Roman numerals instantly. Roman numerals are still widely used today — in movie titles and credits, clock faces, book chapters, Super Bowl numbers, Olympic Games, monarchy names (King Charles III), and formal document numbering. Understanding Roman numerals is both practically useful and a connection to the ancient world.

How to Use This Tool

1
Select the conversion direction — number to Roman, or Roman to number.
2
Enter your number (1-3999) or Roman numeral.
3
The conversion result appears instantly below.
4
Use the reference chart at the bottom to understand individual numeral values.

Why This Matters

Frequently Asked Questions

Q: Why do Roman numerals stop at 3,999?
A: Standard Roman numerals use M for 1,000, and the highest standard number is MMMCMXCIX (3,999). Numbers 4,000 and above would require additional symbols (like a bar over a letter to indicate ×1,000) which aren't standardised.
Q: Why is 4 written as IV and not IIII?
A: IV uses the subtractive principle — placing a smaller numeral before a larger one means subtraction. So IV = 5-1 = 4. Similarly, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900.
Q: Why are Roman numerals still used today?
A: They add gravitas and timelessness to formal contexts. Movie copyright years in Roman numerals make it harder to immediately date the film. Clock faces use them for aesthetic reasons. The tradition of Super Bowl numbering in Roman numerals began with Super Bowl V.
Q: What year is MMXXVI?
A: MMXXVI = 2026. MM = 2000, XX = 20, VI = 6. Total: 2026.
💡 Pro Tip: Roman numerals are a great addition to design projects, tattoos, and personalised gifts when representing meaningful years (birth year, wedding year). Just double-check the conversion — a permanent tattoo with the wrong year would be unfortunate!