Roman Numerals Converter
Category: Unit and Number Tools
Last Updated On: July 2, 2026
Convert numbers to Roman numerals and Roman numerals back to numbers quickly and securely.
About the Tool - Roman Numerals Converter
The Roman Numerals Converter allows you to instantly convert numbers into Roman numerals and vice versa. It supports values from 1 up to 3999, ensuring accuracy for the classical Roman numeral system.
Features
- Instant conversion of integers (1–3999) to Roman numerals.
- Reverse conversion of Roman numerals to integers.
- Validation of Roman numeral input to prevent errors.
- Works entirely in your browser – no data sent to server.
- One-click copy of the result.
- Clear input/output fields with a single click.
How to Use
- Enter a number (e.g., 2025) or a Roman numeral (e.g., MMXXV) into the input field.
- Click Convert to Roman to convert a number into Roman numerals.
- Click Convert to Number to convert a Roman numeral into an integer.
- The result will appear in the output box.
- Use the Copy button to copy the result to your clipboard.
- Click Clear to reset both fields.
Example
Input: 1987 → Output: MCMLXXXVII
Input: XLII → Output: 42