Roman Numeral Converter
Use our free Roman numeral converter to convert numbers to Roman numerals and Roman numerals to numbers instantly. Perfect for education, history, and numbering systems - completely free with no registration required.
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About Roman Numeral Converter
Our free online Roman numeral converter helps you convert between numbers and Roman numerals instantly. Whether you're learning about Roman numerals, working with historical documents, or need to convert numbering systems, this Roman numeral converter makes it easy. For other number tools, check out our Number & Date Tools category.
Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Our Roman numeral converter supports bidirectional conversion: numbers to Roman numerals (1-3999) and Roman numerals to numbers. It uses the standard Roman numeral characters: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). For other conversions, try our Percentage Calculator.
Key Features:
- Bidirectional conversion - Convert numbers to Roman numerals and vice versa
- Range support - Support for numbers 1-3999 (standard Roman numeral range)
- Validation - Validates both input numbers and Roman numeral format
- Educational - Provides explanations and examples
- Standard notation - Uses standard Roman numeral characters (I, V, X, L, C, D, M)
- Instant conversion - Fast, accurate conversion in real-time
Enter a number between 1 and 3999
Roman Numeral Reference
| Roman Numeral | Value | Example |
|---|---|---|
| I | 1 | I = 1, II = 2, III = 3 |
| V | 5 | V = 5, IV = 4 |
| X | 10 | X = 10, IX = 9, XX = 20 |
| L | 50 | L = 50, XL = 40 |
| C | 100 | C = 100, XC = 90, CC = 200 |
| D | 500 | D = 500, CD = 400 |
| M | 1000 | M = 1000, CM = 900, MM = 2000 |
How to Convert Roman Numerals
- Select the conversion type: Number to Roman Numeral or Roman Numeral to Number
- Enter the value you want to convert:
- For Number to Roman: Enter a number between 1 and 3999
- For Roman to Number: Enter a valid Roman numeral (I, V, X, L, C, D, M)
- Click "Convert" to get the converted value
- Review the result with explanation and conversion details
- Copy the result if needed for your application
Learn more: According to Wikipedia's article on Roman Numerals , Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Numbers in this system are represented by combinations of letters from the Latin alphabet.
Roman Numeral Use Cases
Education
Learn and practice Roman numeral conversion for educational purposes
History & Literature
Convert Roman numerals found in historical documents and literature
Entertainment
Convert Roman numerals used in movie titles, book chapters, and events
Numbering Systems
Convert between different numbering systems for various applications
Frequently Asked Questions
Is the Roman numeral converter free to use?
Yes, our Roman numeral converter is completely free to use. No registration or payment required.
What is the range of numbers supported?
We support numbers from 1 to 3999, which is the practical limit for standard Roman numeral notation.
What Roman numeral characters are supported?
We support all standard Roman numeral characters: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000).
Can I convert both ways?
Yes, you can convert numbers to Roman numerals and Roman numerals to numbers.
How are Roman numerals validated?
Our converter validates Roman numerals by checking character validity and format correctness, ensuring the input follows standard Roman numeral rules.
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