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Hex to Roman Converter

Convert hexadecimal numbers to Roman numerals instantly. Perfect for developers, educators, and students working with number systems and historical notation.

Max value: F9F (3999)
Quick examples:

Your Roman numeral result will appear here...
Hex:
→
Decimal:
→
Roman:

📜 Roman Numeral Reference

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

💡 How to Use This Tool

Convert any hexadecimal number to Roman numerals in seconds. Follow these simple steps:

1

Enter Hex Value

Type or paste your hexadecimal number. Values from 1 to F9F (3999) are supported.

2

Click Convert

Press the "Convert to Roman" button or hit Enter to convert.

3

View Result

Your Roman numeral result appears instantly. Enable "Show decimal value" for the conversion breakdown.

4

Copy Result

Click "Copy" to copy the Roman numeral result to your clipboard.

📖 About Hex to Roman Converter

What is Hex to Roman Conversion?

Hex to Roman conversion is a two-step process that first converts a hexadecimal (base-16) number to decimal, then converts that decimal to Roman numerals. This is useful for combining modern computing notation with classical representation.

How the Conversion Works

Step 1: Hex to Decimal Each hexadecimal digit (0-9, A-F) is converted to its decimal equivalent and multiplied by the appropriate power of 16.

Step 2: Decimal to Roman The decimal number is then converted to Roman numerals using standard rules:

  • I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000
  • Subtractive notation: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900

Example: Hex 'FF' = 255 decimal = CCLV (200 + 50 + 5)

Common Use Cases

  • Educational: Teaching number systems and historical notation
  • Programming: Converting memory addresses to readable formats
  • Historical Research: Working with classical texts and modern data
  • Data Visualization: Alternative display formats for hex values
  • Games & Design: Roman numeral styling for hex-based data

Limitations

Roman numerals traditionally represent positive integers from 1 to 3,999 (I to MMMCMXCIX). For values above 3,999, extended notation with overlines (vinculum) is used, though this tool focuses on standard notation.

Privacy & Security

This tool runs entirely in your browser using JavaScript. Your data is never sent to any server—all conversion happens locally on your device.

❓ Frequently Asked Questions

Yes! All conversion happens locally in your browser using JavaScript. Your data never leaves your device and is not sent to any server.
Standard Roman numerals can represent numbers from 1 to 3,999 (I to MMMCMXCIX). This corresponds to hex values from 1 to F9F (3999 in decimal). Values above 3999 require extended Roman notation.
Yes! This converter automatically handles the common "0x" prefix used in programming languages like C, C++, Java, and JavaScript. You can enter "0xFF" or just "FF".
Standard Roman numerals use: I (1), V (5), X (10), L (50), C (100), D (500), M (1000). Subtractive combinations like IV (4), IX (9), XL (40), XC (90), CD (400), and CM (900) are also used.
Roman numerals were not designed to represent zero or negative numbers. They were created for counting and recording positive whole numbers in ancient Rome.