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Octal to Hex Converter

Convert octal numbers to hexadecimal instantly. Perfect for developers, programmers, and students working with different number systems and low-level programming.

Supports 0o prefix
Quick examples:

Binary will appear here...
Your hex result will appear here...

📐 Step-by-Step Breakdown

Final Hex:

💡 How to Use This Tool

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

1

Enter Octal Value

Type or paste your octal number. The 0o prefix is optional.

2

Click Convert

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

3

View Results

See both the binary intermediate and final hex result instantly.

4

Copy Result

Click "Copy" to copy the hex result to your clipboard.

📖 About Octal to Hex Converter

What is Octal to Hexadecimal Conversion?

Octal (base-8) is a number system using digits 0-7, while hexadecimal (hex, base-16) uses digits 0-9 and letters A-F. Converting between these bases is common in computing, especially when working with permissions, memory addresses, and digital systems.

How Octal to Hex Conversion Works

The conversion process involves two steps:

  1. Octal to Binary: Convert each octal digit to its 3-bit binary equivalent
  2. Binary to Hex: Group binary digits into sets of 4 (from right to left) and convert each group to hex

Example: Octal 37 → Binary 011111 → Hex 1F

Common Use Cases

  • Unix File Permissions: Converting chmod values to hex for programming
  • Assembly Programming: Working with processor instructions and memory
  • Legacy Systems: Converting between different number formats
  • Digital Electronics: Logic design and digital circuits
  • Data Representation: Converting between different bases for analysis
  • Educational Purposes: Learning about number systems

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.

Technical Details

  • Supports standard octal notation (digits 0-7 only)
  • Handles optional "0o" prefix commonly used in Python
  • Automatic padding for proper binary grouping
  • Validates input for proper octal format

❓ 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.
JavaScript safely handles integers up to 2^53 - 1 (9007199254740991). For very large octal values, results might lose precision.
Yes! This converter automatically handles the common "0o" prefix used in Python and other programming languages. You can enter "0o77" or just "77".
Hexadecimal (base-16) is widely used in computing for memory addresses, color codes (like #FF0000 for red), and representing binary data compactly. Each hex digit represents exactly 4 binary digits.
First convert octal to binary (each octal digit = 3 bits), then group the binary from right to left in sets of 4 bits, and convert each group to hex (0-F).