Roman Numeral Converter
Convert between Roman numerals and decimal numbers instantly online. Enter a number (1–3999) to get its Roman numeral, or enter a Roman numeral to get its decimal value. Free and runs in your browser.
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How to Use the Roman Numeral Converter
- Enter a decimal number (1–3999) to convert it to a Roman numeral.
- Enter a Roman numeral (e.g. XIV) to convert it to decimal.
- The result appears instantly. Click Copy Output to copy it.
- Use Load Example to convert 2024 as a sample.
Roman Numeral Reference
- I = 1, V = 5, X = 10, L = 50
- C = 100, D = 500, M = 1000
- Subtractive notation: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900
- Range: 1 (I) to 3999 (MMMCMXCIX)