Weighted Grade Percentage Calculator
Calculate your weighted average grade from multiple assignments with different weights
Grade Entries
Add more grades to reach 100%
Calculate Remaining Grade Needed
Grade needed on remaining work:
–
Weighted Grade Results
Grade Breakdown
Common Weighted Grade Examples
| Assignment | Grade | Weight | Contribution | Weighted Average | Letter Grade |
|---|---|---|---|---|---|
| Homework (85%) | 85% | 20% | 17.0% | 87.2% | B+ |
| Midterm (90%) | 90% | 30% | 27.0% | 87.2% | B+ |
| Final (88%) | 88% | 50% | 44.0% | 87.2% | B+ |
| Example 1: Weighted average = (85×0.20) + (90×0.30) + (88×0.50) = 17 + 27 + 44 = 88% (B+) | |||||
| Quizzes (75%) | 75% | 25% | 18.75% | 79.25% | C+ |
| Project (82%) | 82% | 35% | 28.7% | 79.25% | C+ |
| Final (80%) | 80% | 40% | 32.0% | 79.25% | C+ |
Weighted Grade Report
Generated by SabiCalculator Weighted Grade Percentage Calculator
How It Works: Calculate Your Weighted Grade Percentage
This weighted grade percentage calculator calculates your overall course grade when different assignments have different weights. Unlike simple averages, weighted grades account for the importance of each assignment in your final grade.
Formula:
Weighted Grade = Σ(Grade × Weight) ÷ Σ(Weights)
Sum of (each grade multiplied by its weight), divided by total weights
Why Calculate Weighted Grades?
Most college and high school courses use weighted grading systems. A final exam worth 40% of your grade affects your overall score much more than homework worth 10%. Understanding weighted grades helps you:
- Prioritize your study efforts effectively
- Understand your true course standing
- Calculate what you need on remaining work
- Make informed decisions about where to focus
- Track your progress accurately throughout the semester
- Plan strategically for final exams and major projects
How Weighted Grading Works
In a weighted grading system, each assignment category has a specific percentage weight. The sum of all weights should equal 100%.
| Assignment Type | Your Grade | Weight | Calculation | Contribution |
|---|---|---|---|---|
| Homework | 85% | 20% | 85 × 0.20 | 17.0% |
| Midterm Exam | 90% | 30% | 90 × 0.30 | 27.0% |
| Final Exam | 88% | 50% | 88 × 0.50 | 44.0% |
| Total | – | 100% | Sum | 88.0% |
In this example, your weighted average is 88% (B+), not the simple average of 87.67%.
Real Course Examples
Example 1: College Biology Course
Lab Reports: 85% (weight 25%), Quizzes: 90% (weight 15%), Midterm: 82% (weight 30%), Final: 88% (weight 30%). Weighted average: (85×0.25) + (90×0.15) + (82×0.30) + (88×0.30) = 21.25 + 13.5 + 24.6 + 26.4 = 85.75% (B).
Example 2: High School Math Course
Homework: 95% (weight 10%), Classwork: 88% (weight 20%), Tests: 78% (weight 50%), Final Project: 92% (weight 20%). Weighted average: (95×0.10) + (88×0.20) + (78×0.50) + (92×0.20) = 9.5 + 17.6 + 39 + 18.4 = 84.5% (B).
Example 3: Graduate Seminar
Participation: 90% (weight 15%), Presentation: 85% (weight 25%), Research Paper: 88% (weight 40%), Final Exam: 92% (weight 20%). Weighted average: (90×0.15) + (85×0.25) + (88×0.40) + (92×0.20) = 13.5 + 21.25 + 35.2 + 18.4 = 88.35% (B+).
Common Weighted Grade Calculation Mistakes
Students often make these errors when calculating weighted grades:
Mistake 1: Using simple average instead of weighted average
Adding all grades and dividing by number of assignments ignores different weights. This gives incorrect results.
Mistake 2: Not converting weights to decimals
30% weight should be 0.30 in calculations. Multiply grade by 0.30, not 30.
Mistake 3: Forgetting that weights must sum to 100%
If your weights don’t add to 100%, your calculation will be incorrect. Always check the total.
How to Calculate What You Need on Remaining Work
This is the most important calculation for students. Here’s the formula:
Remaining Grade Formula:
Needed Grade = [Target Grade – Σ(Current Grade × Current Weight)] ÷ Remaining Weight
Subtract your current weighted contribution from target, divide by remaining weight percentage
Example: You have 85% on work worth 60% of your grade. You want 90% final grade. Remaining work is worth 40%. Calculation: [90 – (85×0.60)] ÷ 0.40 = (90 – 51) ÷ 0.40 = 39 ÷ 0.40 = 97.5%. You need 97.5% on remaining work.
Weighted vs. Unweighted Grades
| Aspect | Weighted Grades | Unweighted Grades |
|---|---|---|
| Calculation Method | Grades × Weights, then sum | Simple average of all grades |
| Accuracy | Reflects actual course structure | Distorts importance of assignments |
| Common Use | College and high school courses | Elementary school, simple tracking |
| Strategic Value | Helps prioritize study efforts | No strategic advantage |
Frequently Asked Questions
How do I find my assignment weights?
Check your course syllabus. Weights are usually listed for each assignment category (homework, quizzes, exams, projects). If not specified, ask your instructor.
What if my weights don’t add to 100%?
Either you’re missing some assignments, or there’s an error. Weights should sum to 100%. Double-check your syllabus or ask your instructor for clarification.
Can I calculate weighted grades with incomplete work?
Yes, but you’ll need to estimate future grades or calculate what you need on remaining work. Use the “Calculate Remaining Grade Needed” feature in this calculator.
How do extra credit assignments affect weighted grades?
Extra credit typically adds points to a specific category. Add it to that category’s grade before calculating the weighted average.
What’s the difference between weight and percentage?
Weight is how much an assignment counts toward your final grade (e.g., 30%). Percentage is your score on that assignment (e.g., 85%). You multiply percentage by weight to get contribution.
How accurate is this weighted grade calculator?
This calculator uses precise mathematical calculations. Results match exactly what instructors would calculate if they use the same weights and grades.
Country-Specific Grading Considerations
United States:
Most universities use A-F scale with weighted grading. Common weights: Homework 10-20%, Midterms 20-30%, Final 30-40%, Projects 15-25%. Passing is typically 60% or 70%.
Canada:
Similar to US but often with plus/minus distinctions. Weights may vary by province and institution. Some courses use 50% as passing grade.
United Kingdom:
University classifications: First (70%+), Upper Second (60-69%), Lower Second (50-59%), Third (40-49%), Fail (below 40%). Weights often emphasize final exams more heavily (50-70%).
Australia:
High Distinction (85%+), Distinction (75-84%), Credit (65-74%), Pass (50-64%), Fail (below 50%). Weights vary but often include substantial final assessments.
Strategic Study Tips Based on Weighted Grades
Prioritize High-Weight Assignments:
Focus your best effort on assignments with the highest weights. A 10% improvement on a 40% final exam affects your grade more than perfecting a 5% homework assignment.
Calculate Mid-Semester:
Use this calculator halfway through the semester to see where you stand. This gives you time to improve before final exams or major projects.
Set Realistic Targets:
Use the “Calculate Remaining Grade Needed” feature to set achievable targets for remaining work. Don’t aim for 100% if you only need 75% to reach your goal.
Pro Tip: Track Throughout the Semester
Don’t wait until the end of the semester to calculate your weighted grade. Enter grades as you receive them to track your standing. This helps you make timely adjustments to your study strategy and seek help if needed.
This weighted grade percentage calculator is designed to give you accurate, instant calculations for your course grades. Whether you’re a student tracking your progress, a parent helping with schoolwork, or an instructor verifying grades, this tool simplifies complex weighted calculations into clear, actionable results.