GPA calculator
A GPA isn't the average of your grades — it's weighted by credit hours, so a five-credit course counts far more than a one-credit one. Enter credits alongside each grade.
Credits are the weight
Each letter grade maps to points on the standard four-point scale (A = 4.0, B = 3.0, and so on, with plus and minus grades at the usual thirds). Every course contributes its points multiplied by its credit hours, and the total is divided by total credits. That's why a B in a four-credit science class hurts more than a B in a one-credit elective — it carries four times the weight.
The bonus field handles weighted scales. Many schools add 1.0 to honours or AP courses, producing the 4.5 and 5.0 GPAs people quote; enter 1.0 there if that's your school's rule, or 0.5 for schools that add half a point. The bonus is only applied to passing grades, since a failed AP class doesn't earn bonus credit anywhere.
One caution when comparing yourself to others: weighted and unweighted GPAs are not the same number, and different schools use different bonuses and different plus/minus rules. Your GPA is only strictly comparable to someone on the identical scale — which is exactly why universities recalculate applicants' GPAs themselves.
Questions
Weighted or unweighted — which should I use?
Leave the bonus at 0 for unweighted, which is what most scholarships and comparisons want. Add 1.0 (or your school's bonus) to see the weighted version your school may report.
What if my school doesn't use plus and minus grades?
Just pick the plain letters. The A-/B+ options exist for schools that use them; ignoring them gives the straight 4.0-scale result.
Does a pass/fail class count?
Usually not toward GPA at all — most schools award the credit without grade points. Leave those courses out entirely rather than entering them as an A.