📌 Overview

Convert numbers to Roman numerals and Roman numerals back to numbers (1–3,999,999). Instant and accurate.

🏛️ Roman Numeral Converter

Convert numbers to Roman numerals and Roman numerals back to numbers (1–3,999,999). Instant and accurate.

Number → Roman

Enter a number.

Roman → Number

Enter a Roman numeral.

🔒 All processing happens in your browser. No data is uploaded to any server.

📋 How to Use

Type an Arabic number to get its Roman numeral.
Or type a Roman numeral to get the number.
Conversions update as you type.
Copy the result with the copy button.

❓ FAQ

What is the largest number supported?

Standard Roman numerals go up to 3,999. We extend to millions using overline notation for thousands.

Is zero supported?

Romans had no numeral for zero, so 0 and negative numbers are not converted.

Is input case sensitive?

No. Roman numerals are accepted in upper or lower case.

💡 Use Cases

🎬

Movies

Decode copyright years in Roman numerals.

📖

Books

Read chapter and volume numbers.

⌚

Clocks

Understand Roman numeral clock faces.

🔗 Related Tools

📖 Deep Dive: Roman Numeral Converter

Convert numbers to Roman numerals and Roman numerals back to numbers (1–3,999,999). Instant and accurate.

Roman Numeral Converter is a free tool that runs 100% in your browser. No signup, no uploads — your data stays private. Perfect for everyday text and data tasks, saving you time and reducing mistakes.