Convert a number between binary, decimal, hexadecimal, and octal. Enter the value and its base.
Decimal
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Base 10 value.Usage Tip
One hex digit equals exactly four binary digits, which is why hex is a handy shorthand for binary.
THE MATH
Each base uses a different set of digits
All convert through a common decimal value
All convert through a common decimal value
Computers store numbers in binary (base 2); programmers often use hexadecimal (base 16) as a compact shorthand.
Decimal (base 10) is everyday counting; octal (base 8) appears in some systems.
Decimal (base 10) is everyday counting; octal (base 8) appears in some systems.
Choose the base of your input, then enter the value.
Binary uses 0-1, octal 0-7, decimal 0-9, hex 0-9 and A-F.
All four representations are shown.
Binary uses 0-1, octal 0-7, decimal 0-9, hex 0-9 and A-F.
All four representations are shown.