What Grade Do I Need on My Final Exam?
Learn how to calculate the exact score you need on your final exam to achieve your target grade in a course.
The Formula
To find the minimum score needed on your final exam:
Required Final Score = (Goal Grade − Current Grade × (1 − Final Weight)) ÷ Final Weight
All values as decimals (e.g., 80% = 0.80).
Example: Current grade 78%, goal 85%, final worth 30%:
- = (0.85 − 0.78 × 0.70) ÷ 0.30
- = (0.85 − 0.546) ÷ 0.30
- = 0.304 ÷ 0.30
- = 101.3% needed — not achievable, need to adjust goal
What If the Required Score Is Over 100%?
This means your target grade is mathematically impossible given your current grade and the final's weight. Options: (1) lower your grade target, (2) check if extra credit is available, (3) speak with your professor about options. Knowing early gives you time to make a plan.
What If You Only Need to Pass?
If you just need to pass the course (typically 60–70% depending on school), apply the same formula with your passing threshold as the goal. Many students are surprised to find they can score quite low on the final and still pass — or conversely, that they need a near-perfect score.
Preparing Strategically
If you need a high final exam score: focus study time on high-weight topics (check the syllabus), practice past exams under timed conditions, and schedule a professor office hours visit to understand what concepts will be emphasized.