Roman Numeral to Number Converter
Parse Roman numerals, even non-standard ones like IIII.
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Parsing used
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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.
使い方
- すべてブラウザ内でローカルに動作します。データは送信されず、アカウントも不要です。
概要
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.
すべてブラウザ内でローカルに動作します。データは送信されず、アカウントも不要です。
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