Tool4SaaS

Roman Numeral Converter

Convert Roman numerals to Arabic numbers and back from 1 to 3999 with validation, subtractive-notation handling, and instant bidirectional results offline.

Roman numeral

More Converters

Unit ConverterJSON ↔ CSV ConverterURL ParserNumber to WordsImage to Base64CSV Viewer

About the author

Written and maintained by the Tool4SaaS team. Every tool runs locally in your browser and is tested in-house for accuracy. Last updated: .

Frequently asked questions

Integers from 1 to 3999, the standard Roman numeral range.

Yes. Switch between number-to-Roman and Roman-to-number.

Yes, it is free, works offline in your browser, and your data never leaves your device.

How to use Roman Numeral Converter

  1. Choose direction: Pick number to Roman or Roman to number.
  2. Enter value: Type a number or a Roman numeral.
  3. Copy result: Copy the converted value.