FREE TOOL
Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals back to numbers. Supports 1 to 3,999.
MMXXIV
M=1000 + M=1000 + X=10 + X=10 + IV=4
Why Use Our Roman Numeral Converter?
Two-Way Conversion
Convert Arabic numbers to Roman numerals and Roman numerals back to Arabic numbers with separate input modes.
Full Range Support
Handles any number from 1 to 3,999 - the complete standard range for Roman numerals.
Step-by-Step Breakdown
Shows exactly how the number is composed from its Roman numeral parts, such as MM + XXIV for 2024.
Roman Numeral Validation
When converting from Roman to Arabic, only valid numeral characters are accepted and invalid input is flagged clearly.
Instant Results
Results update as you type with no button press required. Great for quick lookups during reading or writing.
100% Private
All conversion runs in your browser. No input is sent to any server.
Frequently Asked Questions
How do I convert a number to Roman numerals?
Select the Number to Roman tab, type your number between 1 and 3,999, and the Roman numeral appears instantly with a breakdown of each component.
How do I convert Roman numerals to a number?
Select the Roman to Number tab and type the Roman numeral. The Arabic number equivalent appears as you type.
What is the highest number in Roman numerals?
Standard Roman numerals go up to 3,999 (MMMCMXCIX). Numbers above 3,999 require special notation not covered by the standard system.
Why does 4 become IV instead of IIII?
IV is the subtractive form - placing a smaller numeral before a larger one means subtraction. So IV means 5 minus 1 equals 4.
What is 2024 in Roman numerals?
2024 is MMXXIV. It breaks down as MM (2000) + XX (20) + IV (4).
Is the Roman numeral converter free?
Yes. Completely free with no sign-up required.
More Tools