Use Our Roman Numerals Converter

Quickly convert Roman numerals to Arabic numbers or the other way around. Enter a Roman numeral (e.g., XIV) or a number (e.g., 14) and get instant results.

What Are Roman Numerals?

Roman numerals originate from ancient Rome. They use letters like I, V, X, L, C, D, and M to represent numbers. These numerals are often seen on clocks, books, and historical documents.

They are still common in chapter numbering, event names, monarch titles, centuries, and decorative design. A converter saves time because Roman numeral rules are easy to misread when subtractive forms such as IV, IX, XL, or CM are involved.

How to Use the Roman Numerals Converter?

  1. Step 1: Enter a Roman numeral (e.g., XII) to convert to an Arabic number or enter a number (e.g., 12) to convert to Roman numerals.
  2. Step 2: The result is instantly displayed in the 'Result' field.
  3. Step 3: Use the "Clear" button to reset the fields.

This makes the tool useful for schoolwork, reading inscriptions, interpreting copyright years, and checking whether a numeral is written in a valid form. If you want to browse more maths tools afterwards, you can continue to our full calculations overview.

Examples of Roman Numerals and Their Conversions

Roman to Arabic

For example, if you enter XXIV, it converts to 24.

Arabic to Roman

If you enter 50, it converts to L.

Want to convert a birth year? For example, 1999 becomes MCMXCIX in Roman numerals.