Roman Numeral Converter

How to Use This Tool

Type a number or a Roman numeral into the input box. For numbers, use an integer from 1 to 3999.

If you type a Roman numeral, use the letters I, V, X, L, C, D, or M.

1. Enter your value in the text box.
2. Press the Convert button.
3. View the result below the button.

Input Explanation

The input field accepts an Arabic numeral or a Roman numeral. Only integers from 1 to 3999 work. Roman numeral letters must be in the correct order.

Output Explanation

The output shows the conversion result in bold text. It also gives a brief description that states the value in the other numeral system.

Limitations and Tips

If you enter a number that is below 1 or above 3999, you will see an error message. The tool also checks the accuracy of a Roman numeral. Incorrect formats will display an error.

Examples of Use

• Type 15. The tool shows that 15 equals XV.
• Type MC. The tool shows that MC equals 1100.

Get Started

Try it now. Enter a number or a Roman numeral and press Convert. The converter will change your value and explain the result.

This roman numeral converter is a simple way to switch between numeral systems. Give it a shot and see the result instantly.