Final Grade Calculator — What Score Do I Need on My Final Exam?
This final grade calculator helps you figure out the score you need on your final exam to reach a target overall grade in the class. It's designed for students who want clarity before exam day, and for teachers or parents who want a quick, checkable way to see how exam performance affects the final outcome.
You'll enter your current grade (before the final) and the final exam weight (for example, 20%, 30%, or 40%). Then you enter your target overall grade—maybe that "B" or the passing threshold your course requires. The calculator does the math using weighted grades and returns the required exam score.
Example: if your current grade is 80%, your final is worth 40%, and you want an overall 90%, your required final exam score is the value that makes 90% = 80%×0.60 + final×0.40. If the result comes out above 100%, you'll know the target isn't achievable with the current grading breakdown.
Quick Answer:
To find the exam score you need, subtract your current weighted grade from your target grade, then divide by the exam weight. Example: target 80%, current 75%, exam worth 20% → you need 100% on the final. Use the calculator below for your numbers.
Calculate Required Final Exam Score
Final Grade Calculator
Enter your current grade and target to find out what you need on your final
Your grade before the final exam
How much the final counts toward your grade
The final grade you want to achieve
How it works
Final grades are usually calculated as a weighted average. If your final exam is worth W (as a decimal), then the rest of your grade is (1 − W). The calculator solves for the required final score using:
RequiredFinal = (Target − Current×(1−W)) ÷ W
That means your "current" grade only accounts for the portion of the class that happens before the final, and the final exam score fills in the remaining weight.
Frequently Asked Questions
How do I calculate what I need on my final?
Set your target course grade (for example, 90%) and enter your current grade before the final. Then enter how much the final exam is worth (for example, 40%). The calculator uses the weighted grade formula to solve for the exam score you need.
What if my final is worth 40%?
If your final is worth 40%, the calculator treats your current grade as the remaining 60% of the course. For example, if your current grade is 80% and you want an overall 90%, the required final score is the value that makes: 90% = 80%×0.60 + (final×0.40).
Can I still pass if I fail my final?
Sometimes, yes. If your final is only a portion of your grade (for example, 20–40%), your earlier work may keep you above your passing threshold even if the final exam score is low. Enter your current grade and your required passing grade, then see what score is needed. If the required score is 0% or less, you can still pass even with a failed final.
How do professors calculate final grades?
Most professors calculate final grades using a weighted formula. They assign weights to categories or components (quizzes, homework, midterms, and the final exam). Each component is converted into a percent, multiplied by its weight, and then added together to produce your final course grade. Your syllabus and grading policy are the source of the exact weights.
What is a passing grade?
A passing grade is the minimum overall course grade your school considers passing (often 60%, 65%, or another threshold). Because passing depends on your institution and class policy, use your actual target passing percentage as the "target grade" in this calculator.