How does the calculator know which base my input is in?

You select the source base (binary, octal, decimal or hexadecimal) alongside the number; the calculator then parses the digits according to that base before converting to the others.

What characters are valid for hexadecimal input?

Hexadecimal accepts digits 0-9 and letters A-F (case-insensitive) representing values 10-15; any other character is treated as invalid input.

Number Base Converter

Convert numbers between binary, octal, decimal and hexadecimal.

How this is calculated

Parses the input in the source base, then re-renders in binary, octal, decimal and hexadecimal

Assumptions used in this calculation

Integer only: Only whole numbers are supported; fractional binary/hex/octal values are not converted.

About this calculator

Converts a number between binary, octal, decimal, and hexadecimal, consolidating the master prompt's separate 'Binary Calculator' and 'Hexadecimal Calculator' (plus octal), since all are the same base-conversion operation.

Worked example

Decimal 255

Result: Binary 11111111, Hex FF

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Frequently asked questions

Scientific Notation Calculator

Convert a number to normalized scientific notation.

Number Base Converter

About this calculator

Frequently asked questions

How does the calculator know which base my input is in?

What characters are valid for hexadecimal input?

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