An unweighted grade treats each score or point equally, while a weighted grade gives selected assignments or categories more influence. If exams are 50% of a course and homework is 20%, one percentage point in the exam average affects the final grade more than one percentage point in homework.
What is an unweighted grade?
An unweighted points-based grade adds all points earned and divides by all points possible. If a student earns 420 of 500 points, the unweighted course percentage is 84%. A 20-point quiz has twice the influence of a 10-point quiz because it contributes twice as many possible points.
Some gradebooks instead average assignment percentages equally. In that system, a 10-point quiz and a 100-point exam can have the same influence unless the instructor assigns category weights. Always identify whether the gradebook uses total points, equal assignment averages, or weighted categories.
What is a weighted grade?
A weighted grade multiplies each category average by its share of the final grade, then adds the weighted results. Common categories include exams, quizzes, homework, projects, labs, participation, and a final exam. The category weights should total 100%.
- Convert each weight to a decimal: 40% becomes 0.40.
- Multiply each category average by its decimal weight.
- Add the weighted category results.
- Compare the final percentage with the course grading scale.
Worked weighted-grade example
Suppose a course uses four categories. The weighted contributions add to 85.95%, even though the simple average of the four category percentages is different.
| Category | Average | Weight | Contribution |
|---|---|---|---|
| Exams | 88% | 40% | 35.20 |
| Quizzes | 82% | 25% | 20.50 |
| Homework | 95% | 20% | 19.00 |
| Final project | 75% | 15% | 11.25 |
| Final grade | — | 100% | 85.95% |
Course weights are different from weighted GPA
A weighted course grade describes how assignments contribute to one class percentage. A weighted GPA describes how a school assigns additional grade points to advanced courses such as honors, Advanced Placement, or International Baccalaureate classes. These are separate calculations.
A common unweighted GPA scale tops out at 4.0, but weighted GPA scales vary by school and can exceed 4.0. Percentage-to-GPA conversions also vary. Use the official transcript or school handbook instead of assuming one universal conversion table.
How to check your gradebook calculation
First confirm the category weights in the syllabus. Next, check whether empty assignments are excluded or counted as zeros. Then verify extra credit, dropped scores, late penalties, and rounding. A small policy difference can explain why a manual estimate does not match the learning management system.
For an individual quiz or exam, use a test grade calculator to find the raw percentage. For the full course grade, place that percentage into the correct weighted category.
Grade Calculator Editorial Team
We create plain-language grading tools and educational guides, check every worked example against the underlying formula, and note where school or instructor policies can change the result.