Find out what score you need on your final exam to reach your desired course grade. Free online final grade calculator with best- and worst-case scenarios.
A final exam grade calculator tells you exactly what score you need on an upcoming final exam to reach a target overall course grade. Enter your current grade (everything before the final), your desired final grade, and how much weight the final exam carries, and the calculator solves for the required score — along with what your final grade would be in the best case (100% on the final) and worst case (0% on the final).
This is one of the most practically useful calculations for students during finals week: it removes the guesswork of 'how much do I actually need to study for' by turning your grading syllabus into a concrete number. If the final is worth 20% of your grade and you're currently at an 85% wanting a 90%, you can find out exactly what score gets you there — or find out if that goal is even mathematically possible.
This calculator is useful for students planning study time before finals, for setting realistic grade goals, and for understanding exactly how much a single final exam can move an overall course grade.
A student currently has an 85% grade going into finals, wants to reach a 90% overall grade, and the final exam is worth 20% of the total grade. Required Score = (90 − 85×0.8) / 0.2 = (90 − 68) / 0.2 = 110%. Since this exceeds 100%, a 90% overall grade is not achievable — the student's realistic maximum with a perfect final score would be 85×0.8 + 100×0.2 = 88%.
The required score tells you the exact percentage you need on your final exam to hit your target overall grade — if it's below 100%, your goal is achievable with focused preparation; if it's above 100%, no score on the final alone can get you there, and you may need to consider extra credit or adjust your target. The best-case and worst-case figures show you the full range your grade could land in depending entirely on your final exam performance — a narrow range (small difference between best and worst case) means the final has limited impact on your grade, while a wide range means it's a high-stakes exam worth prioritizing. Use the reference table to understand how sensitive the required score is to the exact exam weight — if you're unsure of the precise weight from your syllabus, checking a few nearby weights can show you whether small uncertainty meaningfully changes your study target.
Enter your current course grade (before the final), your desired overall grade, and how much the final exam is worth as a percentage of your final grade.
Even a perfect score of 100% on the final exam won't reach your desired grade — your target may not be achievable given the exam's weight.
| Final Weight | Required Score |
|---|---|
| 10% | 0% |
| 20% | 0% |
| 30% | 0% |
| 40% | 0% |
| 50% | 0% |