Grade Calculator
Find your weighted grade and the final exam score you need.
Enter scores and weights of 0 or more, with at least one weight above 0.
Letter grade cutoffs
Example cutoffs. Change them to match your class.
Cutoffs must go down from A to D.
Score at least 87.75% on a final worth 40% to finish with 85%.
Final score needed for each grade
| Final grade | Needed on the final |
|---|---|
| A (90%) | 100.25% |
| B (80%) | 75.25% |
| C (70%) | 50.25% |
| D (60%) | 25.25% |
Grade Calculator
The grade calculator works out your current grade in a class when each part, such as homework or exams, counts for a different share. It also tells you the score you need on the final exam to finish with the grade you want.
weighted grade = Σ(score × weight) ÷ Σ(weight)
needed final = (target × total weight − Σ(score × weight)) ÷ final weight
Weights do not have to add up to 100. They are treated as shares of the total.
How to use
- Enter each graded item with its score in percent and its weight in percent from the syllabus. Add more items as needed.
- Enter the weight of the final exam and the grade you are aiming for.
- Read your current grade and the score you need on the final. Change the letter cutoffs if your class uses different ones.
Key terms
Weighted average
An average where each score counts in proportion to its weight. A 90 on homework worth 20% and a 70 on an exam worth 80% gives 74, not the simple average of 80.
Why one exam can move your grade so much
The bigger an item’s weight, the more each point on it changes your final grade. On a final worth 40%, every 10 points you score moves your final grade by 4 points.
| Final weight | Grade change per 10 points on the final |
|---|---|
| 20% | 2 points |
| 30% | 3 points |
| 40% | 4 points |
| 50% | 5 points |
FAQ
What if my weights do not add up to 100%?
The calculator divides by the total weight you entered, so your current grade is the average of the work graded so far.
What does a needed score above 100% mean?
Your target cannot be reached on the final alone. Extra credit or a lower target are the remaining options.
Are the letter grade cutoffs official?
No. Schools and teachers set their own. The 90/80/70/60 values are only a starting point you can change.
Are my grades saved?
No. Nothing is saved or sent to a server. All calculations happen in this browser.