Roman Numeral Converter: Numbers to Roman and Back
Convert Arabic numbers to Roman numerals and Roman numerals to numbers.
Files never leave your deviceFree
How to use it
- Type or paste your text on the left.
- The result appears instantly on the right.
- Use “Copy result”.
About Roman Numeral Converter
Enter a number from 1 to 3999 to get its Roman numeral, or type a Roman numeral to get the value. It is helpful for outlines, centuries, clocks and book chapters.
Example
Input
2026
Result
MMXXVI
FAQ
What is the largest number supported?
3999 (MMMCMXCIX), the largest value in standard Roman notation.
Are my files uploaded to a server?
No. Everything runs in your browser; your files and text never leave your device.
Is it free? Do I need an account?
The tool is free and needs no registration.
Does it work on a phone?
Yes, in modern desktop and mobile browsers; large files depend on your device power.
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