Grade Calculator
Add each grading category — homework, quizzes, exams — with your score and its weight to see your overall course grade instantly.
Your categories
Course Grade
Enter a score and weight for at least one category to see your course grade.
How a Weighted Grade Calculator Works
Most courses do not weight every assignment equally. A syllabus might say homework is worth 20% of your grade, quizzes 15%, a midterm 25%, and the final exam 40%. Your overall grade is a weighted average of your category scores, where each score counts in proportion to its weight.
To calculate it, multiply your percentage in each category by that category's weight, add all those products together, and divide by the total weight. When the weights add up to 100%, the division simply returns the weighted total; when they do not, dividing by the actual total weight gives your grade on the work completed so far.
Course grade = Σ ( category score × category weight ) ÷ Σ ( weights )
This is exactly the method instructors use, so the figure here should match your gradebook when you enter the same weights from your syllabus. The calculator also flags when your weights do not total 100%, which is your cue that work is still outstanding or a category is missing. Once you know your percentage, the tool maps it to a letter grade on the standard scale.
Worked example
- Homework — 95% × weight 20% → 19.0
- Quizzes — 88% × weight 15% → 13.2
- Midterm — 82% × weight 25% → 20.5
- Final exam — 90% × weight 40% → 36.0
Weighted total = 88.7 over 100% weight → course grade = 88.7%, a B+.
Percentage to Letter Grade
This calculator maps your weighted percentage to a letter using the common US scale below. Your instructor's exact cut-offs may vary.
| Percentage | Letter | Grade 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 |
| 60–69% | D+ / D | 1.0–1.3 |
| Below 60% | F | 0.0 |
Frequently Asked Questions
How does a weighted grade calculator work?
A weighted grade calculator combines your scores in each grading category according to how much that category counts toward your final grade. You enter the percentage you earned in each category — homework, quizzes, exams, and so on — along with its weight. The calculator multiplies each score by its weight, adds the results, and divides by the total weight to produce your overall course grade. This mirrors exactly how most syllabi compute final grades, so the number you see should match what your instructor will record, provided you enter the same weights listed in your course outline.
What if my category weights don't add up to 100%?
That usually means some graded work is still outstanding, or you have not entered every category yet. The calculator handles this by dividing by the total weight you actually entered, so the result reflects your grade on the work completed so far rather than your final course grade. If your weights sum to less than 100%, treat the figure as a current standing — and the tool flags when the total is not 100% so you are not misled. To see your projected final grade, add the remaining categories with your expected scores.
How do I convert my percentage to a letter grade?
Most schools use a standard mapping: 90% and above is an A, 80–89% a B, 70–79% a C, 60–69% a D, and below 60% an F, with pluses and minuses splitting each band. This calculator shows the matching letter automatically using that common scale. Be aware that exact cut-offs vary — some instructors set an A at 93%, others at 90%, and a few curve grades. Always confirm against your syllabus, because a single percentage point near a boundary can change the letter your transcript records.
Can I use this to find my current grade mid-semester?
Yes, that is one of its most useful jobs. Enter only the categories that have been graded so far and the calculator divides by their combined weight, giving your standing on completed work. This is ideal for checking where you sit before a withdrawal deadline or deciding how hard to push for the rest of the term. When you want to know the specific score you need on a remaining exam to reach a target, switch to the final grade calculator, which solves that question directly.
What is the difference between a grade calculator and a GPA calculator?
A grade calculator works within a single course, combining your assignment and exam scores by their weights to produce one course grade, usually a percentage. A GPA calculator works across courses, converting each course's final letter grade into grade points and averaging them by credit hours. In short, you use a grade calculator to find your mark in one class, then feed that result — as a letter grade — into a GPA calculator to see how it affects your overall average. The two tools sit at different stages of the same process.
Should I enter scores as points or percentages?
Enter percentages for the most reliable result. If a category is made up of several assignments, first work out your average percentage in that category, then enter that single percentage with the category's weight. Mixing raw points and percentages will skew the math, because the calculator treats every score field as a percentage out of 100. If your syllabus weights individual assignments rather than categories, you can list each assignment as its own row with its own weight — the formula works the same way regardless of how finely you break things down.