calculators
Roman Numeral Converter
Convert Roman numerals to Arabic numbers and vice versa. Supports numbers from 1 to 3999 with validation.
Frequently Asked Questions
What range of numbers is supported?
Roman numerals from 1 (I) to 3999 (MMMCMXCIX).
Can I convert in both directions?
Yes. Select Number to Roman or Roman to Number mode.
What if I enter an invalid Roman numeral?
The tool shows an error message for invalid Roman numeral format.