How Weighted Grades Work
In most courses, different assessments carry different weights toward your final grade. A midterm exam might count for 30%, assignments 20%, and the final exam 50%. Your final grade is the weighted average — not the simple average — of all your scores.
Weighted Average FormulaFinal Grade = Σ(Score × Weight) ÷ Σ(Weights)
Example: Assignments 85% (20%) + Midterm 78% (30%) + Final 90% (50%)
= (85×20 + 78×30 + 90×50) ÷ 100
= (1700 + 2340 + 4500) ÷ 100 = 85.4%
Example: Assignments 85% (20%) + Midterm 78% (30%) + Final 90% (50%)
= (85×20 + 78×30 + 90×50) ÷ 100
= (1700 + 2340 + 4500) ÷ 100 = 85.4%
Letter Grade Scale
| Percentage | Letter Grade | GPA Points |
|---|---|---|
| 90–100% | A / A+ | 4.0 |
| 80–89% | B | 3.0 |
| 70–79% | C | 2.0 |
| 60–69% | D | 1.0 |
| Below 60% | F | 0.0 |
What Score Do You Need on the Final?
To calculate the score needed on your final exam to achieve a target grade:
Required Final Score = (Target Grade − Current Weighted Score) ÷ Final Exam Weight
Example: Target 80%, current weighted score 75% on 50% of grade, final worth 50%:
Required = (80 − 75×0.5) ÷ 0.5 = (80 − 37.5) ÷ 0.5 = 85% on final exam
📝 Calculate your weighted final grade instantly
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