Number Base Converters: Binary, Hex, Decimal and Octal
Computers store numbers in binary, programmers write them in hexadecimal, and people count in decimal. Converting between them follows simple rules, and these tools show each step so you can learn the method as well as get the answer.
Each converter handles one pair, with a reference table of common values. For any other base, use the general number base converter.
Binary to Decimal ConverterConvert binary numbers to decimal, with the working shown step by step.Decimal to Binary ConverterConvert decimal numbers to binary, with the working shown step by step.Hexadecimal to Decimal ConverterConvert hexadecimal numbers to decimal, with the working shown step by step.Decimal to Hexadecimal ConverterConvert decimal numbers to hexadecimal, with the working shown step by step.Binary to Hexadecimal ConverterConvert binary numbers to hexadecimal, with the working shown step by step.Hexadecimal to Binary ConverterConvert hexadecimal numbers to binary, with the working shown step by step.Octal to Decimal ConverterConvert octal numbers to decimal, with the working shown step by step.Decimal to Octal ConverterConvert decimal numbers to octal, with the working shown step by step.Decimal to Ternary ConverterConvert decimal numbers to ternary, with the working shown step by step.Ternary to Decimal ConverterConvert ternary numbers to decimal, with the working shown step by step.Binary to Octal ConverterConvert binary numbers to octal, with the working shown step by step.Octal to Binary ConverterConvert octal numbers to binary, with the working shown step by step.Roman Numeral ConverterConvert numbers from 1 to 3999 into Roman numerals, and Roman numerals back into numbers.Number Base ConverterConvert whole numbers between binary, octal, decimal, hexadecimal and any base from 2 to 36.
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