Assignment Weight Calculator Formula
Understand the math behind the assignment weight calculator. Each variable explained with a worked example.
Formulas Used
Weighted Final Grade
weighted_grade = (hw_score * hw_weight + midterm_score * midterm_weight + final_score * final_weight) / total_weightHomework Contribution
hw_contribution = hw_score * hw_weight / total_weightMidterm Contribution
midterm_contribution = midterm_score * midterm_weight / total_weightFinal Contribution
final_contribution = final_score * final_weight / total_weightVariables
| Variable | Description | Default |
|---|---|---|
hw_score | Homework Score(%) | 88 |
hw_weight | Homework Weight(%) | 30 |
midterm_score | Midterm Score(%) | 76 |
midterm_weight | Midterm Weight(%) | 30 |
final_score | Final Exam Score(%) | 82 |
final_weight | Final Exam Weight(%) | 40 |
total_weight | Derived value= hw_weight + midterm_weight + final_weight | calculated |
How It Works
How Weighted Grades Work
Weighted grading assigns different importance to categories. A final exam worth 40% affects your grade more than homework worth 30%.
Formula
Weighted Grade = (Score_1 x Weight_1 + Score_2 x Weight_2 + ...) / Total Weight
Each category's contribution equals its score times its weight divided by total weight. This ensures proper proportional representation.
Worked Example
Homework: 88% (30% weight), Midterm: 76% (30% weight), Final: 82% (40% weight).
- 01HW contribution: 88 x 30 = 2640
- 02Midterm contribution: 76 x 30 = 2280
- 03Final contribution: 82 x 40 = 3280
- 04Total: 2640 + 2280 + 3280 = 8200
- 05Weighted grade: 8200 / 100 = 82.0%
Frequently Asked Questions
What if my weights don't add up to 100?
The calculator normalizes by dividing by the total weight, so it works correctly even if weights sum to something other than 100.
How do I know the weights for my class?
Check the course syllabus. Instructors are required to disclose grading weights at the start of the term.
Can I add more assignment categories?
This tool supports three categories. Combine smaller categories (e.g., quizzes + participation) into one entry.
Ready to run the numbers?
Open Assignment Weight Calculator