Type a number to see it in Roman numerals, or type Roman numerals to get the number. Works from 1 to 3999.
Tap any row to load it into the converter.
Roman numerals use seven letters, each with a fixed value:
You build a number by adding letters from largest to smallest — so MMXXVI is 1000 + 1000 + 10 + 10 + 5 + 1 = 2026. When a smaller letter comes before a larger one, you subtract it: that's why 4 is IV (5 − 1) rather than IIII, and 9 is IX (10 − 1).
Only six subtractive combinations are allowed: IV (4), IX (9), XL (40), XC (90), CD (400) and CM (900). A letter is never repeated more than three times in a row, which is why the largest standard Roman numeral is 3999 = MMMCMXCIX.
IV — five (V) minus one (I). Clock faces sometimes use IIII instead, but the standard form is IV.
2026 is MMXXVI. Enter any year above to convert it.
Standard Roman numerals only go up to 3999. Larger numbers historically used a bar over a numeral (a vinculum) to multiply it by 1000, but that notation isn't part of everyday use.