🔢 Roman Numeral Converter

📖 How to Use

✦ Quick Start

1. Enter input：Paste or type your data in the input field.
2. Configure options：Adjust parameters as needed.
3. View results：Click the button to process. All data is handled locally in your browser — nothing is uploaded to any server.

✦ How to Read and Write Roman Numerals

Roman numerals use 7 symbols: I(1), V(5), X(10), L(50), C(100), D(500), M(1000). Rules: same symbol max 3 consecutive (III=3); smaller before larger = subtract (IV=4); smaller after larger = add (VI=6).

✦ Common Modern Uses of Roman Numerals

Roman numerals are still widely used: clock faces (I-XII), book chapters, movie/TV release years, monarch/papal names (Elizabeth II), sports events (Super Bowl LVIII), and outline hierarchies.

✦ Why Roman Numerals Don't Exceed 3999?

Standard Roman numerals lack symbols for 5000 and beyond. Traditional usage maxes out at 3999 (MMMCMXCIX). Extended notation using vinculum (overline for ×1000) exists but is not standard.