Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals back to numbers instantly.
How to Use the Roman Numeral Converter
1
Choose Direction
Select whether to convert a number to Roman numerals or decode Roman numerals to a number.
2
Enter Value
Type a number (1-3,999) or a Roman numeral like XIV or MCMXCVIII.
3
Get Result
Click Convert and see the result instantly.
Frequently Asked Questions
Roman numerals are a numeral system originating in ancient Rome using letters from the Latin alphabet: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). Numbers are formed by combining these letters.
Roman numerals use additive and subtractive notation. When a smaller numeral appears before a larger one, it is subtracted (e.g., IV = 4). When it appears after, it is added (e.g., VI = 6). Only powers of 10 (I, X, C, M) can be subtracted.
Using standard notation, the largest number is 3,999 (MMMCMXCIX). Larger numbers can be written with a vinculum (a bar over the numeral multiplies it by 1,000). This converter supports numbers from 1 to 3,999.
Yes, this Roman numeral converter is completely free. All conversion is done locally in your browser with no server uploads.
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