Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal

Input Number

Input Base

Binary (2)11111111

Octal (8)377

Decimal (10)255

Hexadecimal (16)FF

Frequently Asked Questions

How does binary work?▼

Binary (base 2) uses only 0 and 1. Each digit represents a power of 2. For example, binary 1010 = 8+0+2+0 = 10 in decimal.

What is hexadecimal?▼

Hexadecimal (base 16) uses 0-9 and A-F. Each hex digit represents 4 binary bits. It's commonly used in programming for colors and memory addresses.