Roman Numeral Converter
Convert Roman numerals & numbers
How to Use
1
Choose direction
Select Roman to Arabic or Arabic to Roman.
2
Enter number
Type the number to convert.
3
View result
See the conversion instantly.
4
Copy
Copy the result to clipboard.
Frequently Asked Questions
What is the largest Roman numeral?
Standard notation goes up to 3,999 (MMMCMXCIX). Larger numbers use different notation systems.
How do I read Roman numerals?
Add values left to right, but subtract when a smaller numeral precedes a larger (IV = 4, not 6).
Why are Roman numerals still used?
Common in clocks, movie credits, chapter numbers, Super Bowl numbering, and formal documents.