Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal.
Frequently asked questions
Which number bases are supported?
Binary (base 2), octal (base 8), decimal (base 10) and hexadecimal (base 16). Enter a value in any base and see it in all the others.
Why convert between bases?
Programmers use hex and binary constantly — for colours, bit flags, memory addresses and network masks. Converting by hand is error-prone; this does it instantly.
What is the largest number it handles?
It works with standard 64-bit integers. Extremely large values beyond that range are not supported.