Loading…
Convert between Arabic numbers (1–3999) and Roman numerals. Type in either field to convert.
Roman numerals use the seven letters I, V, X, L, C, D and M, covering the range 1 to 3999. Everything runs in your browser.
It supports the integers 1 to 3999, which is the range that standard Roman numerals can represent. Zero, negative numbers, and values of 4000 or more are not supported.
Yes. Whether you type into the number field or the Roman numeral field, the other field is updated automatically.
Invalid forms such as 'IIII' or 'VV' show an error. Enter a valid combination of the letters I, V, X, L, C, D, and M.