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Roman Numerals Converter
Convert numbers to and from Roman numerals.
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ℹ️ This tool is for informational purposes only. It does not replace professional advice.
The Roman numerals converter works both ways: type a decimal number (from 1 to 3999) to see its Roman representation, or enter a valid Roman numeral to get its value in Arabic numerals. It also shows the symbol-by-symbol breakdown so you understand how each figure is built. Great for study, translating movie titles, centuries or classic clock faces. Use it as many times as you need: it is completely free, requires no sign-up and works directly in your browser.
Frequently asked questions
¿Qué números se pueden convertir a romanos?
Con la notación clásica se representan de forma estándar del 1 al 3999. Para números mayores se usan convenciones como la barra superior (vinculum) que multiplica por 1000, que esta herramienta no utiliza.
¿Cómo se lee un número romano como MMXXIV?
Se lee de izquierda a derecha sumando los valores, salvo cuando una letra menor precede a una mayor (como IV o XC), caso en que se resta. Ejemplo: MMXXIV = 1000 + 1000 + 10 + 10 + (5 − 1) = 2024.
¿Por qué no se escribe 4 como IIII?
La forma estándar actual es IV (5 − 1). La variante IIII se ve en algunos relojes antiguos por tradición, pero no es la notación normativa.
What numbers can be converted to Roman numerals?
With classical notation, the standard range is 1 to 3999. Larger numbers use conventions like the overline (vinculum) that multiplies by 1000, which this tool does not use.
How do you read a Roman numeral like MMXXIV?
Read it left to right, adding the values; when a smaller letter precedes a larger one (like IV or XC) you subtract. Example: MMXXIV = 1000 + 1000 + 10 + 10 + (5 − 1) = 2024.
Why isn't 4 written as IIII?
The standard form today is IV (5 − 1). The IIII variant appears on some old clocks by tradition, but it is not the normative notation.