Weighted grade calculator
Calculate your current class grade from weighted categories or raw points, then solve for the exact score you need on the final exam to hit your target.
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- Free, no account
| Category | Score | Weight | Points contributed |
|---|---|---|---|
| Homework | 92% | 20% | 18.4 |
| Quizzes | 85% | 15% | 12.75 |
| Midterm | 78% | 25% | 19.5 |
grade = Σ(score × weight) ÷ Σ(weight)
= 5,065 ÷ 60
= 84.42% → B| Letter | Percentage | Typical GPA points |
|---|---|---|
| A+ | 97 – 100 | 4.0 |
| A | 93 – 96.99 | 4.0 |
| A− | 90 – 92.99 | 3.7 |
| B+ | 87 – 89.99 | 3.3 |
| B | 83 – 86.99 | 3.0 |
| B− | 80 – 82.99 | 2.7 |
| C+ | 77 – 79.99 | 2.3 |
| C | 73 – 76.99 | 2.0 |
| C− | 70 – 72.99 | 1.7 |
| D+ | 67 – 69.99 | 1.3 |
| D | 63 – 66.99 | 1.0 |
| D− | 60 – 62.99 | 0.7 |
| F | Below 60 | 0.0 |
Scales vary by school — some drop the plus/minus grades, some set an A at 90% flat. Change the target percentage above to match whatever your syllabus says. 90% is the most common A cut-off outside the plus/minus system.
How to calculate your grade
- Weighted — copy the categories and weights from your syllabus (homework 20%, quizzes 15%, midterm 25%, final 40%) and enter the score you have in each. Leave anything ungraded blank.
- Points — for classes graded on total points, enter points earned and points possible for each assignment.
- Final needed — enter your current grade, what the final exam is worth and the grade you are aiming for.
Every tab shows the working and a letter grade on the standard US scale, and the weighted tab also shows the best grade still mathematically available to you.
The weighted grade formula
grade = Σ(score × weight) ÷ Σ(weight)
With homework at 92% (weight 20), quizzes at 85% (weight 15) and a midterm at 78% (weight 25):
(92 × 20) + (85 × 15) + (78 × 25) = 1,840 + 1,275 + 1,950 = 5,065
5,065 ÷ (20 + 15 + 25) = 5,065 ÷ 60 = 84.4%
Dividing by the graded weight rather than by 100 is deliberate. It answers the question you actually have mid-term — "where do I stand on the work that has been marked?" — instead of pretending the unmarked 40% is a zero. The calculator shows that pessimistic figure too, next to the best score still reachable.
What do I need on the final?
The final grade is a weighted average of two things, so solving for the exam score gives:
needed = (target − current × (1 − w)) ÷ w
where w is the final's weight as a decimal. With an 84% going in, a final worth 30% and a 90% target:
needed = (90 − 84 × 0.70) ÷ 0.30 = (90 − 58.8) ÷ 0.30 = 104%
Which is the useful kind of bad news: an A is out of reach without extra credit, and the outcome table shows that a perfect final still leaves you at 88.8%. Aim at the grade you can actually get, or talk to the instructor early.
How much the final can move your grade
| Final is worth | Best case from an 84% | Worst case from an 84% | Swing |
|---|---|---|---|
| 10% | 85.6% | 75.6% | 10.0 pts |
| 20% | 87.2% | 67.2% | 20.0 pts |
| 30% | 88.8% | 58.8% | 30.0 pts |
| 40% | 90.4% | 50.4% | 40.0 pts |
| 50% | 92.0% | 42.0% | 50.0 pts |
The swing is always exactly the weight of the final, which is a good sanity check on any answer you get here or anywhere else.
Weighted versus points-based grading
In a weighted class, each category owns a fixed share of the final grade no matter how many assignments are in it. Ten homework tasks worth 20% together are worth 2% each; one exam worth 25% is worth twelve times any one of them.
In a points-based class, everything is simply added up. A 100-point exam counts five times a 20-point quiz automatically, and there are no category weights at all. Check the syllabus before you assume — the same 88% can be an A− in one scheme and a B+ in the other.
Standard US letter grades
| Letter | Percentage | GPA points |
|---|---|---|
| A+ | 97–100 | 4.0 |
| A | 93–96.99 | 4.0 |
| A− | 90–92.99 | 3.7 |
| B+ | 87–89.99 | 3.3 |
| B | 83–86.99 | 3.0 |
| B− | 80–82.99 | 2.7 |
| C+ | 77–79.99 | 2.3 |
| C | 73–76.99 | 2.0 |
| C− | 70–72.99 | 1.7 |
| D+ | 67–69.99 | 1.3 |
| D | 63–66.99 | 1.0 |
| D− | 60–62.99 | 0.7 |
| F | Below 60 | 0.0 |
Scales vary. Some schools use a flat 90/80/70/60 split with no plus or minus grades, some set an A at 94, and a few use a 7-point scale where an A starts at 93. Set your target percentage to match your own syllabus rather than the table above.
Turning percentages into a GPA
Letter grades convert to grade points, and grade points weighted by credit hours make a GPA. Once the semester is finished, the GPA calculator takes your letters and credits and produces the semester and cumulative figures.
Privacy
Your scores never leave the browser. There is no login, no autosave to a server and no analytics on what you enter.
Questions
How is a weighted grade calculated?
Multiply each category score by its weight, add those products up, then divide by the total weight that has been graded so far. A 92% homework score worth 20% contributes 18.4 points towards the 20 available.
What do I need on the final to get an A?
Use the "Final needed" tab: enter your current grade, what the final is worth and the grade you want. The answer is (target − current × (1 − weight)) ÷ weight, and the table shows where every plausible exam score lands you.
Why do my weights need to add up to 100%?
They do not have to while the term is running — anything not yet graded simply has no score. The calculator tells you when the total is not 100% and still computes your grade over the graded portion, which is what your teacher sees mid-term.
What is the difference between weighted and points-based grading?
Weighted grading fixes each category's share of the final grade regardless of how many assignments it holds. Points-based grading just totals every point earned, so a 100-point exam matters five times as much as a 20-point quiz. Both are on separate tabs here.