Uses sixteen symbols. Since we run out of single digits after 9, we use letters: 0-9 stay the same. A = 10 B = 11 C = 12 D = 13 E = 14 F = 15 Why do we use it?
(Digit×16n)+(Digit×16n−1)…open paren Digit cross 16 to the n-th power close paren plus open paren Digit cross 16 raised to the n minus 1 power close paren … Example: Convert 2B3 to Decimal We have three digits: 2 , B , and 3 . Assign the values: The "3" is in the 16016 to the 0 power place (units). The "B" is in the 16116 to the first power place (sixteens). The "2" is in the 16216 squared place (two-hundred-fifty-sixes). Convert letters to numbers: Do the math: Add them up: So, 2B3 in Hex is 691 in Decimal. Quick Reference Table Pro-Tips for Fast Conversion hex to decimal
Knowing that F is 15 and FF is 255 is incredibly helpful, especially when working with RGB colors or network masks. Uses sixteen symbols