🔢 Number Base Converter

Convert numbers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Essential for programmers and computer science students.

Enter a number: From base:

Binary (base 2):

Octal (base 8):

Decimal (base 10):

Hex (base 16):

Number Systems Reference

Decimal	Binary	Octal	Hex
0	0	0	0
5	101	5	5
10	1010	12	A
15	1111	17	F
16	10000	20	10
255	11111111	377	FF

Binary — Digits 0-1. The foundation of all digital computing.
Octal — Digits 0-7. Used in Unix file permissions and some legacy systems.
Decimal — Digits 0-9. The standard human number system.
Hexadecimal — Digits 0-9 and A-F. Used for color codes, memory addresses, and binary shorthand.