Decimal Converter

Decimal Converter takes an ordinary base-10 whole number and gives back its binary, octal and hexadecimal forms at once, with the base you choose as the main answer.

The number is read by the browser's own integer parser and reprinted in each target base, hexadecimal letters in upper case. The ceiling matters more on this page than on the other base pages, because decimal is where large values actually get typed: the input must remain an exactly representable integer, so 9,007,199,254,740,991 is the largest accepted and a full 64-bit value is turned away with a message asking for fifteen significant digits or fewer. There is no arbitrary-precision path behind this. Nothing fractional converts either — a decimal point fails the digit check rather than producing a binary fraction.

A number typed here is converted by code that is already loaded in the page. No request leaves the browser, so there is nothing in transit to intercept and nothing retained once you navigate away.

Turning a decimal constant into the hexadecimal form an assembler or register map expects, checking an octal permission value against its decimal equivalent, producing a binary bitmask from a plain number, and verifying a base conversion done by hand.

Also known as: decimal to hex · dec to bin · base 10 converter · number base converter · change decimal format