Student guide
How Weighted Grades Work
Understand category weights so homework, tests, projects, and finals count the way your class actually counts them.
Weights change the meaning of an average
A weighted grade gives each category a different share of the final grade. A 90% homework average may not offset a low test average if tests count much more.
Formula
Weighted grade = Sum of category grade x category weight
Example: Homework at 95% worth 20%, tests at 82% worth 60%, and a final at 88% worth 20% gives a weighted grade of 85.8%.
Common mistakes
- Averaging category percentages without applying weights.
- Using category weights that do not add up to the graded portion of the class.
- Forgetting that final exams often have their own separate weight.
FAQ
Why is my weighted grade different from my average?
Some categories count more than others, so the calculator gives heavier categories more influence.
Do weights need to add to 100?
Most full-class category systems add to 100%, but some gradebooks show only remaining or active categories.
What should I use next?
Use the Final Exam Calculator if your final has a separate weight.
Keep exploring
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Helpful reading
Related Guides
Plain-English explanations for the math behind the result.