Roman Numeral Converter (Advanced)
Arabic ↔ Roman numeral. Standard form for 1–3999. For ≥4000 we use Unicode combining overline (U+0305) applied to each character of the thousands part; fromRoman() also accepts that form. Rendering depends on your font — some browsers may break the overline.
About this tool
Roman Numeral Converter (Advanced) is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Math — Advanced. Browse more Math — Advanced tools.