How to Use
- 1
Type a number in any of the four fields - binary (base 2), octal (base 8), decimal (base 10), or hexadecimal (base 16).
- 2
All other bases update instantly as you type.
- 3
Click Copy next to any field to copy that representation to your clipboard.
Frequently Asked Questions
What is binary? ▼
Binary is base 2, using only digits 0 and 1. It is the fundamental language of computers, where every bit is either off (0) or on (1). The decimal number 10 is 1010 in binary.
What is hexadecimal used for? ▼
Hexadecimal (base 16) uses digits 0-9 and letters A-F. It is widely used in programming for memory addresses, color codes (#FF5733), byte values, and representing binary data compactly - 1 hex digit = 4 binary bits.
What is octal? ▼
Octal (base 8) uses digits 0-7. It appears in Unix file permissions (e.g., chmod 755) and was historically used in early computing as a compact representation of binary groups of 3 bits.