Teachers usually weight parts of a course differently: homework might count 20%, quizzes 20%, the midterm 30% and the final exam 30%. Enter each part with your score and its weight, and this grade calculator works out your weighted average and letter grade. Add as many rows as you need.
The second section answers the question every student asks before exams: what do I need on the final? Enter your current grade, the grade you want and how much the final is worth, and you get the exact score required. Your weighted grade is copied in automatically.
How to use the Grade Calculator tool
- Enter each assignment or category with your score in percent and its weight.
- Add or remove rows as needed.
- Read your weighted grade and letter grade.
- In the final exam section, enter the grade you want and the final's weight.
- See the score you need on the final.
Why use ToolOrca Grade Calculator
- Weighted average of any number of items
- Letter grade (A+ to F)
- Works when weights do not add up to 100
- Final exam score needed
- Mobile-friendly rows
- No sign-up, nothing stored
How to calculate a weighted grade
Multiply each score by its weight, add the results, and divide by the total weight. With homework 92% (weight 20), quizzes 85% (weight 20) and midterm 78% (weight 30): (92×20 + 85×20 + 78×30) ÷ 70 = 5,880 ÷ 70 = 84%.
If the weights so far only add up to 70%, the result is your current grade on the work already marked, which is what most online grade books show.
Final exam formula
Needed = (target − current × (1 − final weight)) ÷ final weight. With a current grade of 85%, a target of 90% and a final worth 30%: (90 − 85 × 0.7) ÷ 0.3 = (90 − 59.5) ÷ 0.3 = 101.7%, so a 90% overall is out of reach unless there is extra credit. For a target of 88% you would need 95%.
Frequently asked questions
What do I need on my final to get an A?
Enter your current grade, 90 (or 93 for a solid A) as the target and the final's weight. The calculator shows the score you need.
Do the weights have to add up to 100?
No. If they add up to less, you get your grade on the work entered so far, and a note shows the total weight used.
Can I use points instead of percentages?
Convert each score to a percentage first (points earned ÷ points possible × 100), then enter it with its weight.
Which letter grade scale is used?
A common US scale: A 93–96, A− 90–92, B+ 87–89 and so on, with F below 60. Your school may use a different scale.
How is this different from a GPA calculator?
This tool gives the percentage grade for one class. To combine several classes into a grade point average, use the GPA calculator.