Use category grades, not individual assignment grades
First find each category average, then apply the category weight.
A weighted gradebook does not average every point equally. Each category gets its own importance, so tests can count more than homework even if there are fewer test assignments.
weighted grade = sum(category grade × category weight)
Convert each category weight to a decimal first. A 40% tests category becomes 0.40. Then multiply each category grade by its weight and add the pieces.
| Category | Grade | Weight | Contribution |
|---|---|---|---|
| Homework | 95% | 20% | 95 × 0.20 = 19 |
| Quizzes | 86% | 30% | 86 × 0.30 = 25.8 |
| Tests | 88% | 50% | 88 × 0.50 = 44 |
Add the contributions: 19 + 25.8 + 44 = 88.8%.
First find each category average, then apply the category weight.
If the weights add to 85% or 115%, the result may not match your gradebook.
Write 40% as 0.40 in the formula, but as 40 in most calculator inputs.
A future final exam or project may not count until a score exists, depending on the gradebook.
Pair this guide with the matching calculators, formula reference, and next lesson.
Usually yes. Most class category weights should total 100%. If they do not, check the syllabus or gradebook settings before calculating.
Points grades treat every point equally. Weighted grades let one category, like tests, count more than another category, like homework.
Only include empty future categories if you are running a what-if scenario. For the current grade, use categories with actual scores or follow your teacher's gradebook policy.
Enter your categories, grades, and weights to see the weighted course grade with steps.
Open weighted grade calculator