Final Grade Calculator
Find out exactly what grade you need on your final exam to hit the overall course grade you want — or predict your final course grade if you already know your exam score. Works for any weighted grading system, in any country.
How the final grade calculator works
Near the end of a course, almost every student asks the same question: “what do I need on my final to get the grade I want?” This final exam grade calculator answers it in one click. It uses the standard weighted-average formula that schools, colleges and universities use worldwide, so the result matches how your teacher actually computes your grade.
Your overall course grade is a blend of two things — the grade you have before the final, and the score you get on the final — each weighted by how much it counts:
Overall grade = current grade × (1 − final weight) + final score × final weight
Required final score = (target grade − current grade × (1 − final weight)) ÷ final weight
Switch the dropdown to “Score I need on the final” to work backwards from your target grade, or “Predict my overall course grade” to see your final mark once you know your exam result. Enter grades as percentages — if your school uses letter grades, convert first (for example A = 90%, B = 80%, C = 70%).
A worked example
Suppose your current grade is 82%, the final is worth 30% of the course, and you want to finish with a 90%. The score you need is (90 − 82 × 0.70) ÷ 0.30 = (90 − 57.4) ÷ 0.30 = 108.7%. Because that is above 100%, a 90 is out of reach with this final alone — the calculator flags it and shows the best grade you can still get (86.4% with a perfect final). Lower your target to 88% and the required score drops to a very doable 101.3%… still tight, so aim for 85% and you would land at 82.9%.
Reachable vs impossible targets
Unlike a plain calculator, this tool tells you when a goal is mathematically impossible before you stress over it. If the required final score is above 100%, it means even a perfect exam can’t get you there — so you can set a realistic target instead. If the required score is 0% or negative, congratulations: you’ve already locked in your target grade no matter what happens on the final.
| Common letter grade | Typical % | Typical GPA (US) |
|---|---|---|
| A | 90–100% | 4.0 |
| B | 80–89% | 3.0 |
| C | 70–79% | 2.0 |
| D | 60–69% | 1.0 |
| F (fail) | Below 60% | 0.0 |
Grade bands vary by school and country — check your own syllabus for the exact cut-offs.
Frequently asked questions
What grade do I need on my final exam?
Required final score = (target grade − current grade × (1 − final weight)) ÷ final weight. Enter your current grade, the final's weight and your target grade above for the exact number.
How is my overall course grade calculated?
Overall grade = current grade × (1 − final weight) + final score × final weight. An 86% current grade, a final worth 30% and a 90% final gives 87.2%.
What if the required score is over 100%?
Your target isn't reachable with this final alone. The calculator flags it and shows the highest overall grade you can still earn with a perfect final.
What does the weight of the final mean?
It's the percentage of your total course grade the final is worth. If the syllabus says 25%, enter 25 — the other 75% is your current grade.
Can I still pass if I fail the final?
Set your target to your pass mark (often 50% or 60%). If the required final score is 0 or negative, you've already passed.
Does this work for weighted grades and letter grades?
Yes. Convert letter grades to percentages first (A = 90%, B = 80%), then enter them. The math handles any weighted grading system.