Nubilio tools

Roman Numeral Converter

Convert whole numbers to standard Roman numerals and decode Roman numerals back to integers.

1

Integer to Roman

Enter a number from 1 to 3999.

Roman numeral MCMLXXXIV

2

Roman to Integer

Use standard notation such as XLII or MMXXVI.

Arabic integer 2026

Reference

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

Supported range: I to MMMCMXCIX, matching standard Roman numerals from 1 to 3999.