How Weighted Final Grades Are Calculated
Most courses don't grade everything equally — a final exam usually counts for more than a single homework assignment. The weighted average formula accounts for this:
Final Grade = Σ(Component Score × Component Weight) ÷ Σ(Weights)
For example, if assignments (20% weight) scored 90%, a midterm (30% weight) scored 78%, and a final exam (50% weight) scored 85%, the final grade is:
(90×20 + 78×30 + 85×50) ÷ 100 = (1800 + 2340 + 4250) ÷ 100 = 83.9%
If your weights don't already add up to 100%, the calculator still works correctly — it divides by the total weight entered rather than assuming 100.
Working Backward: What Score Do I Need on My Final?
A common use case is figuring out what score you need on a remaining exam to hit a target grade. Enter your known components and weights, then try different scores for the missing component until the final grade matches your goal — this calculator makes that trial-and-error process fast.
Once you have your final percentage, convert it to a CGPA using our Percentage to CGPA calculator.