Weighted Grade Calculator
Enter each category — homework, quizzes, tests, the final — with its score and how much it's worth. The calculator combines them into your overall weighted grade.
A weighted grade reflects the fact that not every assignment counts equally — a final exam usually matters far more than a single homework. Instead of a plain average, each category's score is multiplied by its weight, so the categories worth more pull the overall grade harder. This tool works whether your weights add up to 100% or not.
How to calculate a weighted grade
Multiply each category's score by its weight, add those products together, then divide by the total of the weights.
| Category | Score | Weight | Score × Weight |
|---|---|---|---|
| Homework | 92 | 20 | 1,840 |
| Quizzes | 85 | 30 | 2,550 |
| Midterm | 78 | 20 | 1,560 |
| Final | 88 | 30 | 2,640 |
| Total | 100 | 8,590 |
Dividing 8,590 by 100 gives a weighted grade of 85.9% — a B on the standard scale.
What if my weights don't add up to 100%?
They don't have to. Because the formula divides by the total of the weights, you can use points, percentages, or any consistent units. If your categories only cover part of the term, the result is your grade so far — useful for checking where you stand before the remaining work is graded.
Weighted grade vs simple average
A simple average treats every category equally. A weighted grade respects your syllabus, where a 30%-weighted final counts three times as much as a 10%-weighted homework set. Always weight by the shares in your syllabus for an accurate picture — a strong score in a low-weight category moves your grade far less than the same score in a high-weight one.
Percentage to letter grade
| Letter | Percentage |
|---|---|
| A | 90–100 |
| B | 80–89 |
| C | 70–79 |
| D | 60–69 |
| F | Below 60 |