Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal. Instant conversion with visual feedback.
BinaryBase 2
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OctalBase 8
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DecimalBase 10
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HexadecimalBase 16
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Examples
About Number Systems
Different number bases are used in computing. Binary (base-2) is fundamental to digital systems. Hexadecimal (base-16) is commonly used for memory addresses and colors.
Why use a number base converter?
Developers frequently need to convert between number systems when working with memory addresses, colors, bitwise operations, or debugging binary data.
Frequently Asked Questions
What is binary?
Binary is a base-2 number system using only 0 and 1. It's the fundamental language of computers as it represents on/off states.
Why is hexadecimal used?
Hexadecimal provides a compact way to represent binary data. Each hex digit represents exactly 4 binary digits, making conversion simple.
What is octal used for?
Octal (base-8) was historically used in computing. Today it's mainly seen in Unix file permissions (like 755 or 644).