Toolzie

Roman Numeral Converter

Number to Roman

Roman to Number

How to Use the Roman Numeral Converter

Enter number or Roman numeral. Instant conversion to the other.

Needed for copyrights, clocks, chapters, outlines. Convert without memorizing rules.

Frequently Asked Questions

Range?

1-3999 (I to MMMCMXCIX).

Basics?

I=1, V=5, X=10, L=50, C=100, D=500, M=1000.

Case?

No, accepts uppercase/lowercase.

Uses?

Clocks, movies, books, monuments, documents.

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About This Tool

Convert between Arabic numerals and Roman numerals instantly with the Toolzie Roman Numeral Converter. Supports numbers from 1 to 3,999 — ideal for students, document formatting, and trivia enthusiasts.

How to Use

  1. Enter an Arabic number (1–3999) to convert to Roman numerals, or enter a Roman numeral to convert to Arabic.
  2. The conversion appears instantly.
  3. Copy the result to use in your document or project.

Frequently Asked Questions

What is the highest number in Roman numerals?

Standard Roman numerals go up to 3,999 (MMMCMXCIX). Numbers above this require special notation not included in standard use.

How do you write 2026 in Roman numerals?

2026 is MMXXVI.

Are Roman numerals still used today?

Yes — in clock faces, book chapters, film sequels, Super Bowl numbers, royal names, and formal document outlines.

Why is 4 written as IV and not IIII?

The subtractive notation (IV = 5 minus 1) is the standard convention. IIII is sometimes used on clock faces for visual balance.