Roman Numeral Converter
Convert Arabic numbers to Roman numerals and back (1 to 3999).
Frequently asked questions
What is the largest Roman numeral?
The standard system goes up to 3999 (MMMCMXCIX), because there is no common notation for 4000.
How is 4 written in Roman numerals?
IV, meaning 1 before 5. The subtractive rule also writes 9 (IX), 40 (XL) and 90 (XC) this way.