Final Grade Calculator
A final grade calculator tells you exactly what score you need on your final exam to achieve a specific overall grade for the course. This is one of the most-searched questions at the end of every semester: students who know their current standing and their target grade want a single number to aim for going into the exam. The tool uses the weighted average formula in reverse. Your current grade represents the portion of the course already completed; the final exam covers the remainder. By entering your current grade, the grade you want to finish with, and the percentage weight of the final exam (as shown on your syllabus), the calculator returns the minimum score required on the final. It also shows the corresponding letter grade on the standard A-F scale and flags whether the score is achievable (100% or below). If you find the required score is above 100%, the tool makes it clear immediately so you can adjust your goal or speak with your instructor. Results update live as you type, making it easy to test different target grades and see what becomes realistic given your current standing and the weight of your final.
You need --% on your final exam (--).
How the final grade formula works
Your final course grade is a weighted average of your current grade (covering work done so far) and your final exam score. Rearranging this formula lets you solve for the required final exam score.
Required exam score = (Desired - Current x (1 - Final weight/100)) / (Final weight/100)
Worked example
Current grade: 82%. Desired grade: 85%. Final exam weight: 30%.
- Weight of existing work: 1 - 30/100 = 0.70
- Contribution of existing work: 82 x 0.70 = 57.4
- Points needed from final: 85 - 57.4 = 27.6
- Required exam score: 27.6 / (30/100) = 27.6 / 0.30 = 92.00%
- 92% corresponds to an A. This is achievable.
Grade scale reference
| Letter | Score range |
|---|---|
| A | 90% to 100% |
| B | 80% to 89% |
| C | 70% to 79% |
| D | 60% to 69% |
| F | Below 60% |
Final grade calculator: frequently asked questions
How do I calculate the score I need on my final exam?
The formula is: required final score = (desired grade - current grade x (1 - final weight/100)) / (final weight/100). For example, if your current grade is 82%, you want a 90%, and the final exam is 25% of your grade: required = (90 - 82 x 0.75) / 0.25 = (90 - 61.5) / 0.25 = 28.5 / 0.25 = 114%. This means a 90% is not achievable with a 25% weighted final and a current grade of 82%.
What if I only need to pass the class, not get a specific letter grade?
Enter the minimum passing grade for your course (often 60% or 70%) as the desired grade. The calculator will then tell you the lowest final exam score you can receive while still passing. This is useful when your current grade is borderline and you want to know the minimum you must score on the final to avoid failing.
What does the achievability indicator mean?
If the required score is 100% or below, the target is achievable: it is mathematically possible to reach your desired grade. If the required score is above 100%, the target is not achievable no matter how well you do on the final. If the required score is negative or zero, you have already secured the desired grade even if you skip the final (though you should still take it).
How does final exam weight affect my grade?
A higher exam weight gives the final more leverage over your grade. A 10% final can shift your grade by only up to 10 percentage points, while a 40% final can shift it by up to 40 points. Students with a low current grade who need a big improvement benefit most from high-weight finals, because they have more opportunity to recover. Students already at their target benefit from low-weight finals, because the exam has less risk.
My teacher uses a different weighting system. Will this still work?
Yes. Enter your current grade as the weighted average of everything graded so far (excluding the final), and enter the final exam's exact percentage weight from your syllabus. The formula works regardless of how the rest of your grade is structured, as long as you know your current standing and the final's weight accurately.
Official sources
- Federal Student Aid Satisfactory Academic Progress: Academic Progress Requirements.
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. See our methodology. General information only; confirm final exam weight with your syllabus.