Weighted Grade Calculator
Calculate your overall course grade when different assignments or categories have different weights. Enter each component with its weight percentage and score โ your weighted average updates instantly. Use What If to see how any single score change impacts your overall grade.
How to Use the Weighted Grade Calculator
In the Calculate tab, enter each assignment or category name, the score you received (as a percentage), and its weight (the percentage it counts toward your final grade). All weights should sum to 100%. Your weighted grade updates instantly. Switch to What If to select any assignment and test a hypothetical score to see how your overall grade would change.
The Advanced calculator below adds multi-semester tracking with scenarios. For a comprehensive gradebook with category analytics and what-if simulation, scroll to the Professional tier.
Weighted Grade Formula
Example:
Homework: 88% ร 15% = 13.20
Quizzes: 82% ร 10% = 8.20
Midterm: 91% ร 25% = 22.75
Lab/Project: 95% ร 20% = 19.00
Final Exam: 87% ร 30% = 26.10
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Sum = 89.25 รท 100 = 89.25% โ B+
Understanding Weight Percentages
Typical college course syllabus:
Homework: 15% | Quizzes: 10% | Midterm: 25% | Lab/Project: 20% | Final Exam: 30%
Total: 100% โ weights sum correctly.
Key insight: Improving a 30%-weight final exam score by 10 points moves your overall grade 3 points. Improving a 10%-weight quiz by 10 points moves it only 1 point. Focus your effort on high-weight items.
What If Analysis
The What If tab lets you change one assignment score and immediately see the impact on your overall grade. This is particularly useful for:
- Pre-final exam planning: "If I score 80% on the final (30% of grade), what overall grade do I get?"
- Understanding high-stakes assignments: See which assignments have the most leverage on your grade
- Setting realistic targets: Find the minimum score you need on remaining work to reach your desired grade
The impact number shows the exact percentage-point change from your current grade to the hypothetical grade โ positive means improvement, negative means a lower grade.
Extra Credit and Grade Scale
Extra credit: Enter scores above 100% to account for extra credit. For example, if you earned 105% on a homework assignment, enter 105. The weighted average will include the bonus, potentially pushing your overall grade above 100%.
Grade scale: A+ 97โ100 | A 93โ96 | A- 90โ92 | B+ 87โ89 | B 83โ86 | B- 80โ82
C+ 77โ79 | C 73โ76 | C- 70โ72 | D+ 67โ69 | D 63โ66 | D- 60โ62 | F 0โ59