Grade Calculator
Combine scores from homework, quizzes and exams by their weights to get your current course grade and letter grade.
How to use the Grade Calculator
- Enter the scores (%) – One percentage per category or assignment.
- Enter the weights (%) – Same order as the scores; leave empty for equal weights.
- Press Calculate. The result updates automatically as you type.
About the Grade Calculator
Most courses weight categories differently: homework might count for 20% while the final exam counts for 30%. A simple average of your scores ignores that and can be off by several points. This calculator multiplies each score by its weight, adds them up and divides by the total weight.
Enter categories (homework average, quiz average, midterm, final) or individual assignments, whichever matches your syllabus. If the semester is not over, enter only what has been graded; the result is your current standing. To find what you need on an upcoming exam, use the final grade calculator.
For point-based classes where every assignment is worth a number of points, add points earned and divide by points possible instead of using weights.
Formula
Weighted grade = Σ(score × weight) ÷ Σ(weight)
Example: (88 × 20 + 92 × 30 + 79 × 20 + 95 × 30) ÷ 100 = 89.5%, a B+. If the weights add up to less than 100%, the result is your grade on the work graded so far.
Letter grades use a common US scale: A 93–96, A− 90–92, B+ 87–89, B 83–86, B− 80–82, and so on down to D− 60–62, with F below 60. Check your syllabus, since scales vary.
Example calculation
Using the default values:
- Scores (%) = 88, 92, 79, 95
- Weights (%) = 20, 30, 20, 30
the calculator returns:
- Weighted grade: 89.5%
- Letter grade: B+
- Total weight entered: 100%
Frequently asked questions
How do I calculate a weighted grade?
Multiply each score by its weight, add the results, then divide by the sum of the weights.
What if my weights don't add up to 100?
That usually means part of the course has not been graded yet. Dividing by the weights you have gives your current grade on completed work.
Is an 89.5 an A?
On the common scale used here it is a B+. Some teachers round 89.5 up to 90, which would be an A−.
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