Binary / Hex / Decimal / Octal Converter
Convert a value between binary, octal, decimal, and hexadecimal.
Binary11111111
Octal377
Decimal255
HexadecimalFF
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How to use this calculator
Enter a value and select which base it's written in. All four representations are shown.
Formula / method used
Each base represents the same value using digits 0..(base-1).