Number Base Converter
Convert a decimal number to binary, octal and hexadecimal.
Result
Binary (base 2)
11111111
Octal (base 8)
377
Hexadecimal (base 16)
FF
How it works
Repeatedly divide by the target base
Computers store numbers in binary; programmers also use octal and hexadecimal as shorter forms. Enter a decimal number to see all three.
Advertisement
Frequently asked questions
What is 255 in hexadecimal?
255 in decimal is FF in hexadecimal and 11111111 in binary.
Why use hexadecimal?
It is compact: one hex digit equals exactly four binary digits, handy for colors and memory addresses.
Advertisement