text: what is grade point average 3.0 on a 4.0 scale in percent? like 86%?   it's 75%.  100/4 = 25 25 x 3 = 75  you can't calculate a gpa by percentage because it's misleading...it makes it sound like a c average.  i would do it the opposite way and say a 3.0 is a b/b-, so it's 80%-85%.