Calculate your weighted average grade for any class
Assignments
Breakdown
Most college courses use weighted grading, where different assignments contribute different percentages to your final grade. A typical structure might be: homework 20%, midterm 30%, final exam 40%, participation 10%. Your final grade is the weighted average of all these components, not a simple average of every score.
The weighted average formula is: Final Grade = Σ(Score% × Weight) ÷ Σ(Weights). For example, if your midterm is 78% (weight 30%) and your final is 85% (weight 40%): (78 × 30 + 85 × 40) ÷ 70 = 82.3%.
| Percentage | Letter | GPA Points |
|---|---|---|
| 97–100% | A+ | 4.0 |
| 93–96% | A | 4.0 |
| 90–92% | A− | 3.7 |
| 87–89% | B+ | 3.3 |
| 83–86% | B | 3.0 |
| 80–82% | B− | 2.7 |
| 77–79% | C+ | 2.3 |
| 73–76% | C | 2.0 |
| 70–72% | C− | 1.7 |
| 67–69% | D+ | 1.3 |
| 63–66% | D | 1.0 |
| 60–62% | D− | 0.7 |
| Below 60% | F | 0.0 |
Scales vary by institution. Always confirm the grading scale in your course syllabus.
How do I calculate my grade with weights?
Multiply each assignment's percentage score by its weight, add them all up, then divide by the total weight. For example, if your midterm (30% weight) is 78% and your final (40% weight) is 85%: (78×30 + 85×40) / 70 = 82.3%.
What is a weighted grade?
A weighted grade accounts for the fact that different assignments contribute different proportions to your final grade. A final exam worth 40% of your grade impacts your final score more than a homework assignment worth 10%.
How do I calculate what I need on my final exam?
Use the formula: Required score = (Target grade − current grade × (1 − exam weight)) / exam weight. For example, if you need a 90% overall, your current grade is 85% (worth 70%), and the final is worth 30%: (90 − 85 × 0.7) / 0.3 = (90 − 59.5) / 0.3 = 101.7%. If the result is over 100%, the target may not be achievable.
What is the difference between a grade calculator and a GPA calculator?
A grade calculator finds your average score within a single course (combining assignments, tests, and projects). A GPA calculator combines letter grades across multiple courses, weighted by credit hours, to produce a 4.0-scale GPA.
What is 90% in letter grade?
In the standard US grading scale, 90–92% is an A−, 93–96% is an A, and 97–100% is an A+. Some schools use a different scale (e.g., 90% = A rather than A−). Check your syllabus to confirm your instructor's scale.
How are grades weighted by professors?
Professors typically list weights in the course syllabus. Common structures: exams 60–70%, homework/labs 20–30%, participation 5–10%. Some use point-based systems rather than percentages — convert by dividing each item's points by total points possible.
Can I calculate my grade without weights?
Yes — if all assignments count equally, toggle off "Use weights" and the calculator will find your simple average: sum all scores, divide by the number of assignments.
How many points do I need to raise my grade?
The impact of a single assignment depends on its weight. A 10-point bonus on an assignment worth 5% of your grade only moves your final grade by 0.5%. Focus your energy on high-weight items like finals and midterms.
Weighted average = Σ(percentage score × weight) ÷ Σ(weights). Percentage score for each item = (score ÷ max score) × 100. Unweighted mode treats all items equally (weight = 1). Letter grades follow the standard plus/minus scale used by most US universities. GPA equivalents follow the 4.0 scale as defined by the American Association of Collegiate Registrars and Admissions Officers (AACRAO).