Roman Numerals Converter
Type a number or Roman numerals to instantly convert it, in either direction.
Pourquoi utiliser cet outil ?
Converting to and from Roman numerals by hand is easy to get wrong, especially with subtractive notation (IV, IX, XL...). This tool converts instantly in both directions, directly in your browser.
Why it's free
A discreet ad banner covers hosting costs — that's the whole business model. No account to create, no usage limit, no paid tier unlocking the real result. Calculations run in your browser, so your numbers, dates and text never leave your device.
How our tools work