How to Use the Roman Numeral Converter
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Enter an integer to convert to Roman numerals.
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Or enter a Roman numeral string (e.g. MMXXIV) to convert to decimal.
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View the conversion with a breakdown of each symbol value.
Practical Example & Use Case
Common Real-World Scenario
Converting 2024 → MMXXIV or decoding Super Bowl LVIII → 58.
Technical Notes & Limitations
Browser Engine Architecture
Standard Roman numerals cover 1–3,999. Extended notation with vinculum covers up to 3,999,999.
Frequently Asked Questions
Why is 4 written as IV not IIII?
IV uses subtractive notation: a smaller value before a larger is subtracted. IV = 5-1 = 4.
Is there a Roman numeral for zero?
No — Romans had no symbol for zero. The concept came from Indian mathematics via Arabic scholars.