Roman numeral conversion

Introduction
The Roman Numeral Converter is a simple and efficient tool that allows you to convert between Arabic numbers (1, 2, 3…) and Roman numerals (I, II, III…).
Roman numerals are an ancient numbering system used in Rome, consisting of letters from the Latin alphabet:

I (1), V (5), X (10), L (50), C (100), D (500), M (1000)

This tool helps you:
✔ Convert standard numbers (1-3999) to Roman numerals.
✔ Convert valid Roman numerals back to Arabic numbers.
✔ Check if a Roman numeral is correctly formatted.

⚠️ Rules for Roman Numerals
Symbols are added from left to right (e.g., VI = 5 + 1 = 6).
If a smaller numeral appears before a larger one, it is subtracted (e.g., IV = 5 – 1 = 4).
Only I, X, C can be used for subtraction (IV, IX, XL, XC, CD, CM).
The same symbol cannot repeat more than 3 times in a row (III is valid, IIII is invalid).

💡 Try It Out!
Enter a number or Roman numeral below and see the conversion instantly!
(Note: This tool supports numbers from 1 to 3999 since higher values require special notations.)