Number Base Converter

Enter a number in any base and instantly see its equivalent in Binary, Decimal, Octal, and Hexadecimal.

Number

Input Base

Binary

Octal

Decimal

Hexadecimal

How to Use

Type a number into the input field.
Select which base that number is currently in (Binary, Octal, Decimal, or Hex).
All four equivalents update automatically below.

Why Number Bases Matter

Computers store and process data in binary (base 2), but humans typically work in decimal (base 10). Hexadecimal (base 16) is widely used in programming to represent memory addresses, color codes, and byte values compactly, while octal (base 8) appears in older Unix file permission systems. This tool is handy for students learning number systems and developers who need quick conversions while debugging.

Frequently Asked Questions

What characters are valid for hexadecimal input?

Hexadecimal uses digits 0-9 and letters A-F (case-insensitive) to represent values 10 through 15.

Does this tool support negative numbers?

This tool is designed for non-negative integers, which covers the vast majority of use cases like memory addresses and color codes.