Enter your grades and weights. Get your final course grade instantly.
CategoryGrade %Weight %Weighted
Your Weighted Average
0%
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Common US scale (reference only)
Grade Contribution by Category
Position on Grading Scale
0%60%70%80%90%100%
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Weighted Avg
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Letter Grade
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Weighted Points
Try:
How It Works
A weighted average grade accounts for the fact that not all assignments matter equally. A final exam worth 50% of your grade has five times more impact than a homework set worth 10%. This calculator multiplies each category’s grade by its weight, adds them all up, and divides by the total weight to give you one number that represents your overall course performance.
Weighted Points = Grade × Weight (for each category)
Weighted Average = Sum of Weighted Points ÷ Sum of Weights
The key insight is that a high grade in a low-weight category does not compensate for a low grade in a high-weight category. Scoring 100% on homework worth 10% cannot offset scoring 50% on a final worth 50%. This is why weighted averages feel unfair to students who do well on small assignments but poorly on big ones. The math is working correctly; the weight distribution is what creates the result.
When People Use This Calculator
Checking your course grade before finals
Enter all your completed categories (homework, quizzes, midterm) with their grades and weights. Leave the final exam row blank or set its grade to what you think you might get. The calculator shows your current standing and what final exam score you would need to reach your target grade.
Understanding why your grade feels wrong
Many students are confused when they score 90% on most assignments but get a B or C as their final grade. This almost always happens because the low-score assignment had a high weight. For example, scoring 60% on a final worth 40% drags an otherwise 90% average down significantly. This calculator makes that dynamic visible in the contribution breakdown, so you can see exactly which category pulled your grade down.
Comparing grading schemes
Some courses weight homework heavily (30%) while others weight exams heavily (60%). Run the same hypothetical grades through both schemes to see how much the weight distribution alone can change your final grade. A student with consistent 80% scores would get 80% under any weighting, but most students are not consistent. The weight distribution matters most when your grades vary across categories.
Planning what to focus on
If your current weighted average is 78% and you need 80% to keep a scholarship, look at which categories are left and their weights. Improving your grade by 2% in a category worth 40% has much more impact than improving by 10% in a category worth 5%. This calculator helps you prioritize your study time based on where points actually come from, not just where you feel weakest.
Verifying a teacher’s calculation
If your reported grade does not match what you expected, enter all your scores and weights from the syllabus and gradebook. If your calculated result matches the teacher’s number, the grade is correct and the weighting scheme is what caused the surprise. If the numbers do not match, there may be an error in how something was recorded or weighted.
Grade optimization tip
If you have limited study time before a final exam, focus on the category with the highest weight that you have not yet completed. Raising a 70% to an 85% in a category worth 40% gains 6 weighted points. Raising a 90% to a 100% in a category worth 10% gains only 1 weighted point. Work where the leverage is.
Common Mistakes People Make
Mistake 1: Entering raw scores instead of percentages
This calculator needs percentages, not raw points. If you scored 38 out of 50 on a test, first convert that to 76% (38 divided by 50, times 100), then enter 76 as the grade. Entering 38 as the grade would give a completely wrong result.
Mistake 2: Weights that do not add up to 100%
If your weights total 90%, the calculator still works but treats your categories as 90% of the course. The remaining 10% effectively counts as zero. This usually means you forgot a category. Check your syllabus carefully for participation, attendance, or other small categories that are easy to overlook.
Mistake 3: Not including all categories
Some courses have 6 to 8 graded components. Missing even a 5% participation category can shift your grade by a full letter if you had a zero in it. List every graded item from your syllabus, no matter how small.
Mistake 4: Using the wrong weight for a dropped score
If your lowest quiz score is dropped, do not include it in the calculation. Adjust the weight of the remaining quizzes proportionally, or reduce the total weight by the dropped item’s portion. Including a dropped zero score will incorrectly lower your calculated average.
Table of Truth: Common Weighted Grade Scenarios
Scenario
Grades
Weights
Weighted Avg
Letter
Strong finish
85, 78, 92, 100
20, 30, 40, 10
87.20%
B+
Exam hurts
95, 82, 88, 62
15, 10, 25, 50
76.50%
C
Consistent B
82, 85, 80, 83
25, 25, 25, 25
82.50%
B-
Homework hero
100, 95, 100, 72
15, 15, 15, 55
84.35%
B
High school
90, 82, 75, 88
15, 10, 25, 50
84.00%
B
Lab science
95, 88, 62
20, 30, 50
76.00%
C
5 categories
100, 95, 85, 90, 82
10, 10, 25, 25, 30
89.00%
B+
All equal
75, 80, 70, 85
25, 25, 25, 25
77.50%
C+
Frequently Asked Questions
How do you calculate a weighted average grade?
Multiply each category’s grade by its weight, add all those products together, then divide by the total weight. For example, if you got 85% on homework (weight 20%) and 90% on the final (weight 80%), your weighted average is (85 x 20 + 90 x 80) / 100 = 89%.
What if my weights do not add up to 100%?
The calculator still works. It divides by the actual sum of your weights instead of 100. However, if weights add up to less than 100%, it usually means you are missing a category. If they add up to more than 100%, you may have entered something incorrectly. Double-check your syllabus.
Is weighted average the same as GPA?
No. GPA converts letter grades to points (usually 0-4 scale) and averages them, often weighted by credit hours. Weighted average grade works directly with percentage scores and category weights. They measure similar things but use different scales and methods.
Can one category ruin my entire grade?
Yes, if the category has a high weight. Failing a final exam worth 50% of your grade is much more damaging than failing a homework worth 5%. The higher the weight, the more impact that category has on your final grade. Use this calculator to see exactly how much.
How do I convert a raw score to a percentage?
Divide the points you earned by the total possible points, then multiply by 100. For example, 38 out of 50 is (38 / 50) x 100 = 76%. You can use a test score calculator to do this conversion first, then enter the percentage here.
What is a good weighted average in college?
In most US colleges, a weighted average of 80% or above (B grade or higher) is considered good. A 70% average (C) is the typical minimum for passing. For graduate school or competitive programs, 85-90% or higher may be expected. Check your specific program requirements.
Does this work for high school GPAs?
This calculator works with percentage grades. High school GPAs typically use a 0-4 point scale based on letter grades. To use this for GPA planning, enter your estimated percentages for each course, get the weighted average, then convert the final percentage to a letter grade and finally to GPA points. For precise GPA calculation, use a dedicated GPA calculator.
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Patrick has spent the better part of a decade helping students make sense of grading systems, credit hours, and degree requirements across four continents. He writes about GPA calculations, university admissions, and academic planning with one goal in mind, making the numbers less scary. When he is not breaking down weighted averages or degree classifications, he is probably overanalysing his own spreadsheets.
