Number Base Converter
Convert numbers between Binary, Octal, Decimal, and Hexadecimal
Number base conversion changes a number from one numeral system to another. The most common systems are Binary (base 2), Octal (base 8), Decimal (base 10), and Hexadecimal (base 16). These are widely used in programming and computer science.
How to convert number bases
Select the base of the number you want to enter (Binary, Octal, Decimal, or Hexadecimal). Type your number in the input field. The tool will instantly display the equivalent value in all other bases.
Where are these number systems used?
Different bases are used in specific technical contexts:
- Binary (base 2) — Used internally by all computers and digital electronics
- Octal (base 8) — Used in Unix file permission notation (e.g. chmod 755)
- Decimal (base 10) — The everyday number system humans use
- Hexadecimal (base 16) — Used in color codes, memory addresses, and debugging
Who uses a number base converter?
Programmers, computer science students, network engineers, and electronics engineers regularly need to convert between number bases. It is also useful when learning how computers store and process data.