The Roman Numeral Converter converts numbers to Roman numerals and back, and writes dates in Roman numerals.
LXIII = 63
| Number | 63 |
| Month.Day.Year | XI.X.MMXXVI |
| Day.Month.Year | X.XI.MMXXVI |
Roman numerals use seven letters: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1,000. Values are added from left to right, except that a smaller numeral before a larger one is subtracted: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900.
Worked example (defaults): LXIII = 50 + 10 + 3 = 63.
A numeral is not repeated more than three times in a row (III, not IIII, in modern use). Only I, X and C are used to subtract, and only from the next two larger numerals. Standard numerals go up to 3,999 (MMMCMXCIX).
Clock faces, book chapters, movie copyright years, Super Bowl numbers, monarchs (Elizabeth II), outlines and tattoos of special dates.
Is there a zero? No, the Romans had no numeral for zero.
How are larger numbers written? A bar over a numeral multiplies it by 1,000.
Why do some clocks use IIII? Tradition and visual balance.