Don't worry. Hexidecimal is very similar to binary.

If you have not seen our binary page, we would suggest for you to read it. Hexadecimal (or base 16) has many of the same concepts, except using powers of 16 instead of two. Also, another change is that instead of using just 1 and 2 to represent the number, you use 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, and f. a would be 10, b 11, and so on. If you had 4 16^{0}s, or 1s, you could put a 4 because 4 is one of the digits available.

link to binary converter: Click here!