Use this calculator to find out your overall course grade based on weighted averages. Accepts percentages, points (e.g. 45/50), and letter grades. You can also calculate the exact score needed on your final exam.
In a weighted grading system, different assignments carry different percentages of the overall final grade (for example, exams may count for 40% while homework counts for 10%). The overall course grade is calculated as:
Score Needed = [Target Grade - (Current Grade × (1 - Final Weight))] ÷ Final Weight
Example: If you currently have an 85% in a class and want a 90% overall, with a final exam worth 30%:
Score Needed = [90 - (85 × 0.70)] ÷ 0.30 = [90 - 59.5] ÷ 0.30 = 30.5 ÷ 0.30 = 101.67%.