Convert numbers between binary, decimal, hexadecimal, and octal formats instantly. This universal converter helps you transform numbers across all major number systems for programming, web development, and digital electronics work.
DEC
Decimal
Base 10
BIN
Binary
Base 2
HEX
Hexadecimal
Base 16
OCT
Octal
Base 8
Number System Information
Decimal (Base 10): Uses digits 0-9. Standard number system used in everyday calculations.
Binary (Base 2): Uses digits 0-1. Foundation of all digital computers and electronic systems.
Hexadecimal (Base 16): Uses digits 0-9 and letters A-F. Common in programming for representing bytes and memory addresses.
Octal (Base 8): Uses digits 0-7. Used in some programming contexts and Unix file permissions.
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