Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal bases instantly.
Quick Reference
โข Binary (Base 2): uses digits 0-1
โข Octal (Base 8): uses digits 0-7
โข Decimal (Base 10): uses digits 0-9
โข Hexadecimal (Base 16): uses digits 0-9 and letters A-F
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What is this tool?
Number base converter transforms values between different numeral systems: binary (base 2), octal (base 8), decimal (base 10), hexadecimal (base 16), and other bases (2-36). Shows real-time conversion across all bases simultaneously. Essential for programmers working with bit manipulation, memory addresses, color codes, and low-level data representation.
How to use
- 1
Enter number
Type a number in any base.
- 2
Select input base
Choose the source base (2-36).
- 3
View all bases
See the value converted to all common bases simultaneously.
Frequently Asked Questions
Why do programmers use hexadecimal?
Hexadecimal (base 16) is a compact representation of binary. Each hex digit maps to exactly 4 bits, making it easy to read and write binary data. 0xFF = 11111111 in binary. It is used for color codes (#RRGGBB), memory addresses, hash values, and byte-level data. Hex is much more readable than raw binary while being a direct mapping.
Can I convert floating point?
Integer is exact. Float may have precision limits.
How accurate are the conversions?
Conversions use standard conversion factors with high precision. For scientific applications use certified tools.