Roman Numeral Converter
Convert numbers to Roman numerals and back.
A Roman numeral converter translates numbers (1–3999) into Roman numerals like XIV, and converts Roman numerals back to numbers.
How to Use the Roman Numeral Converter
- Choose a direction. Pick number-to-Roman or Roman-to-number.
- Enter a value. Type a number or Roman numeral.
- Read the result. See the converted value.
This tool processes your input locally in your browser. Nothing is uploaded.
What Is Roman Numerals?
Roman numerals use combinations of I, V, X, L, C, D and M to represent numbers, still seen in dates, outlines and movie credits.
How Roman numerals work
Values are built by combining symbols; smaller values placed before larger ones are subtracted (e.g. IV = 4), and after are added (VI = 6). Standard ranges cover 1 to 3999.
Key Features
- Both directions
- Validates input
- Local processing
Examples
- 2024 → MMXXIV
- XIV → 14
Common Use Cases
- Dates
- Outlines
- Learning
Tips & Best Practices
- Numbers above 3999 require special notation not covered here.
Limitations
- Limited to 1–3999 for standard conversion.
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Frequently Asked Questions
How do I convert a number to Roman?
Break it into thousands, hundreds, tens and ones, and map each to Roman symbols.
Why is IV used for 4?
A smaller value before a larger one is subtracted: I before V = 4.
Is it free?
Yes, and it runs locally.