How it works
Roman numerals are an ancient counting system built from seven symbols — I, V, X, L, C, D, M — that combine to represent numbers from 1 to 3999. You'll still see them on clock faces, movie release years, and book preface page numbers.
FAQ
Q. Why is the range limited to 3999?
A. In standard notation, numbers above 3999 need a special overline (vinculum) mark for ×1000 multiples, so most converters cap out at 3999.
Q. What is subtractive notation (like IV, IX)?
A. When a smaller symbol precedes a larger one, it's subtracted — IV means 5−1=4, and IX means 10−1=9.