SwiftShort answer
Required score = (target grade − points already banked) ÷ remaining weight. Banked points come from each completed component's average times its syllabus weight; the remaining weight is everything not yet graded. Check feasibility: anything above 100% is out of reach on the remaining work alone, and anything in the high 90s deserves a backup target.
Scope and assumptions
Assumes straight syllabus weights with no curve and no dropped scores. Your syllabus is authoritative, and extra credit or replacement policies change the answer. This page is informational and is not an official grade record.
Every student asks the same question in week 12: what do I need to get a B+? The answer is pure arithmetic — if you can read a syllabus, you can produce it yourself in about a minute.
The formula: required score = (target grade − points already banked) ÷ remaining weight. Bank the components you have finished; whatever is left must come out of what remains.
Where to read next
- Final exam specifically? → Final grade guide
- Combine weighted categories? → Weighted grade guide
- Points earned vs possible? → Grade guide
- One assignment's impact? → Assignment grade guide
What is a required grade calculator?
A required grade calculator runs the weighted formula backwards: from a target letter grade, it computes the score the remaining coursework must produce. It is the planning tool for week 12, when the question stops being "what is my grade" and becomes "what do I need."
How to calculate the required final grade for an A
Required score = (target grade − banked points) ÷ remaining weight Banked points = Σ (finished component average × its weight)
Worked example: what do you need to get a B+ in the class?
The syllabus: homework 20%, midterm 30%, final exam 50%. Averages so far — homework 93.5%, midterm 82.4%.
What grade do you need with a 50% final?
| Component | Weight | Average | Banked |
|---|---|---|---|
| Homework | 20% | 93.5 | 18.70 |
| Midterm | 30% | 82.4 | 24.72 |
| Banked | 50% | 43.42 |
Now the targets (remaining weight = 0.50):
| Target | Required on final | Read |
|---|---|---|
| 93 (A) | 99.16% | Not realistic |
| 90 (A−) | 93.16% | Stretch |
| 87 (B+) | 87.16% | Demanding, on the edge |
| 83 (B) | 79.16% | Realistic |
| 80 (B−) | 73.16% | Safe |
The B+ at 87.16% is the interesting row. This student's homework average is 93.5, but the midterm came in at 82.4 — a single 50%-weight exam under the same conditions is a coin flip at 87.16. The B at 79.16% sits below every score this student has posted all term. That comparison — required score versus demonstrated scores — is the feasibility check a bare calculator cannot do for you.
Worked example: four components, not three
ENG 210 grades on four components: essays 25% (average 89.5), midterm 25% (84.0), presentation 10% (92.5), final exam 40%.
| Component | Weight | Average | Banked |
|---|---|---|---|
| Essays | 25% | 89.5 | 22.38 |
| Midterm | 25% | 84.0 | 21.00 |
| Presentation | 10% | 92.5 | 9.25 |
| Banked | 60% | 52.63 |
B (83): (83 − 52.63) ÷ 0.40 = 75.94% B+ (87): (87 − 52.63) ÷ 0.40 = 85.94%
The presentation at 92.5 barely moves the total: 10% of the course is 10 points of swing, no matter how well it goes. The final exam carries 40, so the B+ lives or dies there.
What to do when the grade needed on the final exam to pass is impossible
A required score above 100% closes the target. Above roughly 95%, treat it as a stretch. In both cases: email the instructor about extra credit before the last day of class, recheck whether a drop-lowest rule changes the remaining weight, and set a backup target you have already proven you can hit.
The forward version of this math has its own tool: use the Final Grade Calculator to price any target on the same syllabus. For the full walkthrough, see what you need on a 40%-weighted final to get an A.
A required score above 100 is an answer, not a mistake
- Using the target letter's midpoint instead of your school's actual cutoffs (many schools put B+ at 87, not 86.5).
- Counting ungraded components as already banked.
- Forgetting that a drop-lowest rule changes the remaining weight, not just the average.
FAQ
Q: How do I work out the grade I need? Subtract your banked points (completed components × their weights) from the target, then divide by the weight of everything still ungraded.
Q: What if I need more than 100%? The target is unreachable on the remaining work — pick a lower target or ask about extra credit before the deadline.
Q: Is a 93% final realistic? Treat anything in the high 90s as a stretch and set a backup target; exam conditions rarely match practice scores.
Q: Which components count as remaining weight? Everything on the syllabus not yet graded — usually the final exam, plus any ungraded homework or quizzes.
Q: Do dropped scores change the calculation? Yes. Apply the drop rule inside its category first; a dropped quiz reduces that category's weight in your projection.
Q: Should I tell my instructor my target? Many will tell you exactly what is left to earn — and whether extra credit exists. Office hours beat guessing.
Q: Does this work for GPA planning too? The same logic scales: convert the target course grade to grade points, then check what it does to your cumulative average.
Q: What target should I pick? The one whose required score you have already achieved on comparable assessments this term.
Sources: grading and weighting conventions (en.wikipedia.org/wiki/Grading_in_education); US letter-grade scales (en.wikipedia.org/wiki/Academic_grading_in_the_United_States).
Disclaimer: Assumes straight syllabus weights with no curve and no dropped scores. Your syllabus is authoritative, and extra credit or replacement policies change the answer. This page is informational and is not an official grade record.