Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal. Auto-converts as you type.
Number Base Converter (Binary, Decimal, Hex, Octal)
Convert numbers between binary, decimal, hexadecimal, and octal systems. Free online base converter for programmers and students.
How It Works
Enter a number in any base (binary, decimal, hex, or octal). The tool instantly converts it to all other number systems simultaneously, showing binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) representations.
Common Use Cases
- Converting hexadecimal color codes to their decimal or binary equivalents
- Debugging low-level code that uses binary or hex representations
- Studying computer science number systems for exams
- Converting IP addresses or subnet masks between formats
Frequently Asked Questions
Hexadecimal (hex) is a base-16 number system using digits 0-9 and letters A-F. It is commonly used in programming to represent colors (#FF0000) and memory addresses.
Binary is a base-2 number system using only 0 and 1. It is the fundamental language of computers and digital electronics.
Octal (base 8) is used in some computing contexts, particularly in Unix/Linux file permissions (e.g., chmod 755).
Binary (base-2) for bit-level operations, octal (base-8) for Unix permissions, decimal (base-10) for human-readable numbers, and hexadecimal (base-16) for colors and memory addresses.
Hexadecimal numbers are prefixed with 0x in most languages (e.g., 0xFF = 255). In CSS colors, they use # (e.g., #FF5733). Octal uses 0o prefix and binary uses 0b.
Yes, enter a number in any base (2 through 36) and convert to any other base. The tool supports all standard and custom bases.
Base-36 uses digits 0-9 and letters A-Z, making it the highest base using single alphanumeric characters. It's used for compact URL-safe identifiers.