Convert numbers from one base to another; for example: decimal (base 10) to hexadecimal (base 16), binary (base 2) to hexadecimal, duodecimal (base 12) to decimal, ternary (base 3) to binary, etc. It will convert between any pair of bases, 2 through 36. Base 36 (alphanumeric without case) "0123456789 ABCDEFGHIJKL MNOPQRSTUVWXYZ".
Also known as binary number system. There are only 2 binary digits: 0 and 1.
Octal means 8. Numbers with base 8 comes under octal number system. It is also called as octadecimal number system. To represent numbers in this number system it make use of 8 digits only they are digits from 0-7.
Also known as decimal number system. The base of the decimal system is 10, there are 10 symbols, 0 to 9.
Hex means 16. Numbers with base 16 comes under hex number system. It is also called as hexadecimal number system. To represent numbers in this number system it make use of 8 digits only they are digits from 0-9 and letters A-F.