Final Exam Calculator
"What do I need on the final?" — enter your current grade and how much the final is worth, and see the score you need for every letter grade, including the ones already locked in and the ones no longer reachable.
What you need on the final, grade by grade
| To finish with | You need on the final |
|---|---|
| A+ (97%+) | Not possible (needs 145%) |
| A (93%+) | Not possible (needs 125%) |
| A- (90%+) | Not possible (needs 110%) |
| B+ (87%+) | 95% |
| B (83%+) | 75% |
| B- (80%+) | 60% |
| C+ (77%+) | 45% |
| C (73%+) | 25% |
| C- (70%+) | 10% |
| D+ (67%+) | Locked in — even a 0 keeps this grade |
| D (63%+) | Locked in — even a 0 keeps this grade |
| D- (60%+) | Locked in — even a 0 keeps this grade |
Assumes the final simply counts for the weight above and everything else stays as entered — the standard syllabus formula.
The one formula behind this page
Final grade = current grade × (1 − final weight) + final score × final weight. To find what you need, solve for the final score: needed = (target − current × (1 − weight)) ÷ weight. Every row of the table is that one line of algebra with a different target — no hidden assumptions, which is more than can be said for most "grade calculators" that quietly guess your target.
Related tools
Questions
How much is my final worth, usually?
Most commonly 10–30% of the course grade; check your syllabus — it is required to say. Some courses weight the final as "the final replaces your lowest test", which this calculator doesn't model.
What if my final can only help me?
Some instructors drop or replace a lower score with the final. In that case the "locked in" rows of the table are your floor — the final can only move you up from there.
Why does the calculator say "not possible"?
Because the math says so: if the needed score is above 100%, no final performance reaches that grade. It is better to know now and aim at the highest grade that is still reachable — the table shows which.