Number Base Converter
Type a number to see it in binary, octal, decimal and hexadecimal at once.
About the Number Base Converter
Enter a number and choose its base; the binary, octal, decimal and hexadecimal results appear together. You can also pick any other base from 2 to 36. Only integers are supported, but very large integers are calculated exactly.
Frequently asked questions
What are A to F in hexadecimal?
Hexadecimal uses 0-9 and then A=10, B=11, C=12, D=13, E=14, F=15. Uppercase and lowercase are the same.
How do I convert binary to decimal?
Multiply each digit by a power of 2 and add them up. Example: 1011 in binary = 8 + 0 + 2 + 1 = 11.
Does it support fractions?
No, only integers.
Why base 36?
It is the largest base that can be written with the digits 0-9 and letters A-Z. It is used to make short codes.
Is what I enter stored on a server?
No. Everything is calculated inside your browser. Nothing you enter is sent to or stored on any server.