1.5 Math for a Digital Age
1.5.8 Hexadecimal to binary conversion

Converting numbers from hexadecimal to binary is really just the reverse method of the previous section. Take each individual hexadecimal digit and convert it to binary, then string together the solution. However, be careful to pad each binary representation with zeros to fill up four binary places for each hexadecimal digit. For example, take the hexadecimal number FE27. F is 1111, E is 1110, 2 is 10 or 0010, and 7 is 0111. So, in binary, the answer is 1111 1110 0010 0111, or 1111111000100111.