Roman Numeral Converter
Enter a number (1-3999) or a Roman numeral to convert it to the other - the tool detects which one you typed.
Last updated: August 31, 2026
Frequently asked questions
What is 1994 in Roman numerals?
MCMXCIV - 1000 (M) + 900 (CM) + 90 (XC) + 4 (IV).
What is 58 in Roman numerals?
LVIII - 50 (L) + 5 (V) + 1 + 1 + 1 (III).
What's the highest number Roman numerals can represent?
Standard Roman numerals go up to 3,999 (MMMCMXCIX) - there's no standard symbol for 4,000 or higher without using an overline or other extended notation.
Why is 4 written as IV instead of IIII?
Roman numerals use a subtractive rule for four specific cases (IV, IX, XL, XC, CD, CM) where a smaller symbol placed before a larger one is subtracted - this keeps numbers shorter than repeating a symbol four times, though IIII does appear historically, especially on clock faces.
How do I convert a Roman numeral back to a regular number?
Type the Roman numeral (like MCMXCIV) into the field above instead of a number - the tool automatically detects whether you entered digits or Roman numerals and converts to the other.