Final Grade Calculator
Your details
Result
You need on the final
- Is that achievable?
- Not reachable
- Target letter grade
- A−
- Best possible final grade
- 88.8% (B+)
- Worst possible final grade
- 58.8% (F)
- A 90% overall is no longer reachable — it would need 104% on the final. Scoring 100% gets you to 88.8%, which is a B+.
What each final score gets you
Your overall course grade for a range of possible final exam results.
| Score on the final | Overall grade | Letter |
|---|---|---|
| 100% | 88.8% | B+ |
| 95% | 87.3% | B+ |
| 90% | 85.8% | B |
| 85% | 84.3% | B |
| 80% | 82.8% | B− |
| 75% | 81.3% | B− |
| 70% | 79.8% | C+ |
| 65% | 78.3% | C+ |
| 60% | 76.8% | C |
| 50% | 73.8% | C |
| 0% | 58.8% | F |
How do you calculate what you need on your final exam?
To find the score needed on a final exam, subtract your current grade multiplied by the remaining course weight from your target grade, then divide by the final's weight. If your current grade is 84%, your target is 90% and the final is worth 30%, you need 104% — which is not reachable.
required = (target − current × (1 − w)) ÷ w- required
- The score you need on the final
- target
- The overall course grade you want
- current
- Your grade so far, excluding the final
- w
- The final's weight as a decimal — 30% is 0.30
Your overall grade is a weighted average of two parts: the work already done, which counts for (1 − w) of the course, and the final, which counts for w. Writing that out gives target = current × (1 − w) + required × w, and rearranging for the unknown produces the formula above. The weight is what makes the result counter-intuitive. A final worth 50% can move a grade enormously, while one worth 10% barely moves it at all — if you are sitting at 84% and the final counts for 10%, the absolute best you can finish on is 85.6%. That is why the answer to "can I still get an A" depends far more on the syllabus than on how hard you study, and why a required score above 100% means the target was already mathematically gone before the exam.
- Find your current grade in the course, excluding the final.
- Check the syllabus for the final exam's weight.
- Multiply your current grade by one minus that weight.
- Subtract the result from your target grade.
- Divide what remains by the final's weight.
- If the answer exceeds 100%, the target is no longer reachable.
Worked example: Currently at 84%, aiming for 90% overall, with the final worth 30%
Currently at 84%, aiming for 90% overall, with the final worth 30%
The work already completed counts for 70% of the course, so it contributes 84 × 0.70 = 58.8 percentage points toward the final grade. Reaching 90% overall means the final must supply the remaining 90 − 58.8 = 31.2 points. Because the final is worth 30% of the course, the score needed is 31.2 ÷ 0.30 = 104% — so a 90% overall is not reachable. A perfect 100% on the final gives 58.8 + 30 = 88.8%, which is a B+. Lowering the target to 87%, the bottom of the B+ band, needs (87 − 58.8) ÷ 0.30 = 94% on the final, which is demanding but possible. The same student with a final worth 50% instead would need only (90 − 42) ÷ 0.50 = 96% — counter-intuitively, a more heavily weighted final makes a recovery easier, because there is more grade left to win.
What each final grade input means
- Your current grade
- Your grade in the course so far, excluding the final. Most learning management systems show this as the running total on the gradebook page.
- Grade you want
- The overall course grade you are aiming for once the final is counted.
- Final exam is worth
- How much of the overall grade the final counts for. This is on the syllabus — it is the number this calculation is most sensitive to.
What this final grade does not account for
- This assumes your course grade is a straightforward weighted average. Courses that drop your lowest quiz, curve the final, or award extra credit will not match the result exactly.
- A required score above 100% means the target is mathematically out of reach, not that you need to attempt extra credit. The calculator reports the best grade still available instead.
- A required score of zero or below means the grade is already secured — you could skip the final entirely and still reach the target, assuming no attendance or completion requirement.
- Letter-grade bands vary by institution. The scale here is the common US one where 93% is an A and 90% an A−; some schools use 94% or a flat 90% for an A.
- If your gradebook already includes a placeholder zero for the unsubmitted final, the current grade shown is understated. Use the grade on completed work only.
- Pass/fail and credit/no-credit courses have a single threshold rather than bands, so only the required-score figure is meaningful.
Frequently asked questions
How do I calculate what I need on my final exam?
Subtract your current grade times the remaining course weight from your target, then divide by the final's weight. At 84% now, targeting 90%, with a final worth 30%: (90 − 58.8) ÷ 0.3 = 104%, so it is out of reach.
What if I need more than 100% on the final?
The target grade is no longer mathematically achievable. Work out the best grade still available — your current grade times the remaining weight, plus the full final weight — and aim at the highest band you can still reach.
How much can a final exam change my grade?
Only by its weight. A final worth 20% can move your overall grade by at most 20 percentage points, and that is from a zero to a perfect score. Check the syllabus weight before assuming a recovery is possible.
Can I still get an A if I have a B now?
It depends almost entirely on the final's weight. From 84% you need 104% on a 30%-weighted final, which is impossible, but only 96% if the final is worth 50%. The heavier the final, the more recoverable the grade.
What grade do I need to pass?
Most courses pass at 60% or 70% overall. Set the target to your institution's threshold and the calculator returns the score needed. A negative result means you have already passed regardless of the final.
Does this work for weighted categories?
It works whenever the final is a single weighted component, which is the usual arrangement. If your course weights homework, midterms and participation separately, use your current overall grade as the input and it still holds.
Sources and review
Last reviewed .