Roman numerals are still used for clock faces, book chapters, film copyright years, monarchs, Super Bowls and event names. Standard form uses at most three repeats of a symbol and six subtractive pairs.
How to use the Roman Numerals Converter
- Direction
- Value
Everything runs in your browser, so results appear instantly and nothing you type is sent to a server.
How it works
Numbers are written by taking the largest symbol or subtractive pair that fits, repeatedly. Roman input is validated against the standard pattern before it is read.
Formula
I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000A smaller symbol before a larger one is subtracted: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900Worked example
Inputs — Direction: Number → Roman numerals; Value: 2026.
Results — Result = MMXXVI; Breakdown = M=1000 + M=1000 + X=10 + X=10 + V=5 + I=1.
Frequently asked questions
Why stop at 3,999?
Standard Roman numerals have no symbol above M; larger numbers used a bar meaning ×1,000.
Is IIII ever correct?
It appears on many clock faces, but IV is the standard form.
Is there a Roman zero?
No; the Romans had no numeral for zero.
What formula does the Roman Numerals Converter use?
I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000.