Roman Numeral Converter
Convert Roman numerals and integers instantly, with strict validation and breakdowns.
Integer to Roman
Result
Roman to Integer
Result
Breakdown
FAQ
What is the Roman numeral range supported?
This converter supports standard Roman numerals for numbers 1 through 3999.
Why is my Roman numeral rejected?
The validator enforces canonical Roman notation, so invalid forms like IIII and IC are rejected.
What does the breakdown show?
It shows additive components (e.g., MCMXCIV → 1000 + 900 + 90 + 4).