Converters · free tool

Roman numeral converter

Convert between Roman (I,V,X,...) and Arabic numerals.

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About this tool

Convert numbers between Roman and Arabic (1-3999). Useful for dates, chapter numbers, clock faces. Processing is local.

When to use it

  • Dates (MMXXVI).
  • Chapter numbers (Chapter IV).
  • Clock faces.
Example

'MMXXVI' → '2026'.

How to use

  1. Enter a number (Roman or Arabic).
  2. Click "Convert".
  3. Copy the result.
Range?

1-3999 (standard notation).

Supports 0?

Roman numerals do not represent 0.

Is data uploaded?

No, processing is local.