Number Base Converter — Binary, Hex, Octal, Decimal

What is Number Base Conversion?

Number base conversion changes how a number is represented without changing its value. The number 255 in decimal is FF in hex, 11111111 in binary, and 377 in octal. They're all the same value, just written in different numeral systems.

Why Use a Number Base Converter?

Low-level programming, networking, and computer science require working across multiple bases. IP addresses and subnet masks are often shown in decimal and binary simultaneously. Color codes use hex. Assembly and bitwise operations require binary. Having instant cross-base conversion saves mental effort.

Key Benefits

• Convert between binary, octal, decimal, and hex simultaneously
• All representations update as you type
• Supports large numbers
• No installation needed
• Copy any base representation instantly

How to Use Number Base Converter

1. Enter a number in any base field
2. All other bases update instantly
3. Copy the representation you need
4. Clear and enter a new number

Example Use Case

Working on a bitwise permissions system where flags are stored as integers. The value 45 in decimal needs to be checked as bits. Enter 45 → binary shows `101101` → bits 0, 2, 3, 5 are set → permissions map confirmed.

Tips

• Hex values are often prefixed with 0x in code (0xFF = 255)
• Binary values can be prefixed with 0b (0b11111111 = 255)
• Octal is less common today but used in Unix file permissions (chmod 755)
• All conversions are integers — this tool does not handle fractional bases