Hexadecimal numeral system takes 16 as its base. The basic number system contains number 0 to 9. Hexadecimal use these decimal number and also includes six extra digit, which are the first six letters from the English alphabet A,B,C,D,E,F. Decimal is a base 10 number system used by humans as we all have 10 fingers. Binary number system is a base 2 number system , holding only 0 and 1s. Use this online converter tool to convert Hexadecimal numbers to decimal and binary numbers at the same time.