Roman Numeral Converter
Convert between Roman numerals and regular numbers.
Usage examples
Reading a Roman numeral title in a book or movie
Quickly figure out which sequel number a movie or book chapter's Roman numeral actually refers to.
Understanding the numerals on a clock face
Convert the Roman numerals on a watch or wall clock when you're not sure what time they represent.
Writing a year in Roman numerals
Get the exact Roman numeral form of a year for a monument inscription or an invitation.
Frequently asked questions
Why does it only go up to 3999?
Standard Roman numeral notation has no official way to repeat symbols to represent 4000 or higher, so this tool is limited to the widely-used 1-3999 range.
Can I write something like IIII?
No. Standard notation avoids repeating a symbol four or more times in a row, using subtractive forms like IV instead. This tool only recognizes standard notation.
Can I type Roman numerals in lowercase?
Yes. Roman numeral input is case-insensitive, and the result is always shown in uppercase.
Can it convert 0 or negative numbers?
No. Roman numerals have no standard way to represent zero or negative values, so only positive integers from 1 and up are supported.