Roman Numeral Converter
Bidirectional input with strict parsing (rejects IIII, IL, VV, etc.), step-by-step decomposition, extended vinculum mode for values up to 3,999,999, year reference grid, and classical date formatter.
Extended (with vinculum)Classical range only: 1 – 3,999.
Enter any integer from 1 to 3,999.
Type in lowercase or uppercase — we'll normalise it.
Decomposition
M1,000
CM900
XC90
IV4
= 1,994Date as Roman numerals
Useful for cornerstones and document dates. Outputs `DD · MM · YYYY` with the standard middle dot.
Roman date
I · VI · MMXXVI