Administration and development

Number base converter

Convert numbers between decimal, hexadecimal, binary, octal and any base up to 36, including very large numbers.

Decimal (base 10)

Hexadecimal (base 16)

Binary (base 2)

Octal (base 8)

Custom base (2–36)

In that base

What does this mean?

Type a number in one of the fields and instantly see it in all the other number systems. You run into hexadecimal and binary with colours, IP addresses, permissions and memory addresses. The tool handles very large and negative numbers, and shows how many bits are needed.

You can leave spaces and a prefix such as 0x, 0b or 0o in. For colours there is also the colour converter.