Roman Numeral to Number Converter
Parse Roman numerals, even non-standard ones like IIII.
—
Parsing used
—
Canonical numeral
Additive and standard subtractive forms both work (IIII and IV both give 4). The canonical field shows the normalised numeral, per the Number to Roman tool. Pairs with that tool.
使用方法
- 一切都在您的浏览器本地运行：不会上传任何数据，无需账户。
关于
Reads Roman numerals with a tolerant parser that accepts both classical and common historical forms (IIII and IV both work), and shows the canonical numeral alongside.
Clock faces traditionally use IIII rather than IV — tolerance matters more than purity when reading real-world inscriptions.
一切都在您的浏览器本地运行：不会上传任何数据，无需账户。
Embed this tool
Customize and copy an iframe. Linking back helps both sites.