A weighted grade reflects how much each assignment counts toward your final mark. Instead of a simple average, each score is multiplied by its weight, the results are summed, and the total is divided by the sum of the weights:
Weighted grade = Σ(score × weight) ÷ Σ(weight)
For example, if a final exam is worth 50% and you scored 80, while two assignments worth 25% each scored 90 and 70, your weighted grade is (80×50 + 90×25 + 70×25) ÷ 100 = 80%.
| Percentage | Letter grade | GPA |
|---|---|---|
| 90–100% | A | 4.0 |
| 80–89% | B | 3.0 |
| 70–79% | C | 2.0 |
| 60–69% | D | 1.0 |
| Below 60% | F | 0.0 |
Multiply each assignment's score by its weight, add those products together, then divide by the total of all the weights. The calculator above does this automatically as you add rows.
Subtract your current weighted points from your target grade, then divide by the weight of the final. For example, to reach 80% overall when the final is worth 40%, enter your other scores and adjust the final's score until the result hits 80%.
Use a standard scale: 90–100% = A, 80–89% = B, 70–79% = C, 60–69% = D, and below 60% = F. See the table above; note that some schools use plus/minus variations.
An unweighted grade treats every assignment equally. A weighted grade gives more importance to items worth more (like a final exam), so they affect your overall mark more than a small quiz.