Online Roman Numerals Converter - Numbers to Roman & Back

Roman Numerals Converter

Enter Number or Roman Numeral:

Result:

What are Roman Numerals?

​Roman numerals are a number system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. They are still used today in clock faces, movie credits, and for numbering monarchs or sporting events like the Olympics.

​How the Roman Numerals Converter Works?

​Our tool is a two-way converter:

1. ​Numbers to Roman: Enter a standard number (like 10) to get its Roman equivalent (X).
2. ​Roman to Numbers: Enter a Roman string (like IX) to get the standard number (9).

​Basic Roman Numeral Chart:

• ​I = 1
• ​V = 5
• ​X = 10
• ​L = 50
• ​C = 100
• ​D = 500
• ​M = 1000

​How to Use:

​Simply type your value in the input box. If you type numbers, it will give you Roman symbols. If you type letters (I, V, X, etc.), it will calculate the numerical value.