Final Grade Calculator
Work out exactly what score you need on your final exam to hit the overall grade you're aiming for — using your current grade and the weight of the final.
Enter the grade you have so far, the overall grade you're aiming for, and how much the final exam counts toward your total grade.
Frequently Asked Questions
What do I need on my final?
Enter your current grade, the overall grade you want, and how much the final exam is worth. The calculator computes the exact percentage you need to score on the final to reach your target.
What if it asks for over 100%?
If the required score is above 100%, the target is not reachable with the current final weight. The tool tells you this and shows the highest overall grade you can still finish with by scoring 100% on the final.
What if I have already passed?
If the required score works out to zero or below, you have already secured your target — even a 0% on the final keeps you at or above your desired overall grade.
Understanding the Final Grade Calculator
The Final Grade Calculator answers the question every student asks before exam week: "What do I need on my final?" Enter the grade you have going into the final, the overall grade you want to finish with, and how much the final exam is worth toward your total grade. The tool instantly works out the exact percentage you need to score on that final exam. It also handles the edge cases honestly — if your target is mathematically out of reach it tells you the best grade you can still earn, and if you have already locked in your goal it lets you relax. Everything runs in your browser; nothing is uploaded.
How it works
Your overall grade is a weighted average of the work you have already completed and the final exam. The calculator treats your current grade as the portion of the course that is already locked in (everything except the final) and the final exam as the remaining weighted slice. It rearranges the weighted-average formula to solve for the one unknown — the score you still need on the final. If that score comes out above 100%, the target cannot be reached with this final weight, so the tool reports the maximum overall grade you could still achieve by acing the final. If it comes out at zero or below, your goal is already secured no matter how the final goes.
Worked example
Suppose your current grade is 82%, you want to finish with 90% overall, and the final exam is worth 30% of your grade. Plugging in: (90 − 82 × 0.70) ÷ 0.30 = (90 − 57.4) ÷ 0.30 = 32.6 ÷ 0.30 ≈ 108.7%. Because that is above 100%, a 90% overall is not reachable here — the best you can finish with is 82 × 0.70 + 100 × 0.30 = 87.4%. Lowering your target to an 87% would make it achievable.
Tips & common mistakes
- Double-check the final exam weight against your syllabus — even a few percentage points changes the score you need.
- If the result is over 100%, lower your target grade or check whether any extra-credit or dropped-lowest-score rules apply.
- A required score of zero or below means you have already passed the threshold; the final can only help from there.
- Your "current grade" should reflect everything completed except the final — not just your latest test.
- Run a few targets (for example a B vs. an A) to see how much harder each goal makes the final.
- Treat the answer as a planning guide; confirm exact grade weights and rounding rules with your instructor.