Exam planning tool
Final Grade Calculator
Find the minimum final exam score you need for your target course grade, with best- and worst-case boundaries and a score scenario table.
Calculation Guide
How the final exam affects your course grade
A final exam moves your course grade only by its weight. A 20% final can shift the result by at most 20 points, which is why knowing the weight matters more than worrying about the exam itself.
This calculator solves the weighted-average equation for the exam score you need. Enter your current average, the final exam weight, and your target, and it returns the minimum exam score plus best- and worst-case boundaries.
How to use the calculator
- 1
Find your current average
Use the average on graded work so far, from your gradebook or the Grade Calculator.
- 2
Confirm the final exam weight
Check the syllabus: a 20% final means the remaining 80% is already determined.
- 3
Set a realistic target
Enter the course grade you want, then read the required exam score and the scenario table.
GPA formula
Required final score = (target − current grade × completed weight − expected remaining average × remaining weight) ÷ final exam weight
All weights enter the formula as decimals. When nothing but the final is left, the completed weight is simply 100% minus the final exam weight.
Final grade example
A student holds an 85% average on 80% of the course, and the final exam is worth 20%. The target is an 85% course grade:
| Component | Value | Weight | Points |
|---|---|---|---|
| Completed coursework | 85% | 80% | 68.0 |
| Final exam | ? | 20% | ? |
The student needs (85 − 68) ÷ 0.20 = 85% on the final exam to finish with an 85%.
Reading the result
- A required score at or below 0% means the target is already secured, even with a zero on the final.
- A required score above 100% means the target is not reachable through the final alone.
- Ungraded assignments besides the final change the math — include them so the completed weight stays accurate.
Frequently asked questions
What if my remaining work is not just the final exam?
Enable the remaining-assignments option and enter their combined weight and your expected average. The calculator then solves only for the final exam portion.
Why does a small final weight barely change my grade?
A 10% final can only move the course grade by 10 points at most. Most of your grade is already fixed by earlier work.
Can extra credit make an unreachable target possible?
Yes. Extra credit raises your current average or adds points outside the standard weights. Recalculate with the adjusted numbers from your instructor.
Is this result official?
No. It is an estimate from the numbers you enter. Your syllabus, grading scale, and instructor determine the official course grade.