Binary Converter
Convert between binary, decimal, hexadecimal, and octal with bit breakdown and ASCII lookup.
Non-negative integers
Bit / Byte Breakdown
8 bits · 1 byte
Number Systems Cheat Sheet
Free guide: binary, hex, and bitwise operations explained.
Frequently Asked Questions
How do you convert binary to decimal?
Each binary digit represents a power of 2, starting from the right. Multiply each bit by 2^position and sum the results. For example, binary 1011 = 1×8 + 0×4 + 1×2 + 1×1 = 11 in decimal.
What is hexadecimal and why is it used?
Hexadecimal (base-16) uses digits 0–9 and letters A–F. It compactly represents binary data — each hex digit corresponds to exactly 4 binary bits. It's widely used in programming, color codes, and memory addresses.
What is octal notation?
Octal (base-8) uses digits 0–7. Each octal digit represents 3 binary bits. It was historically used in computing but has largely been replaced by hexadecimal for most modern applications.