I am at 89% and need an A — what do I need on the final?
This is a protection problem rather than a rescue. At 89% with a 20% final, the A at 90 needs a 94 — reachable — but the more useful figure is the downside: a 70 on the exam finishes you at 85.2, and a 60 finishes you at 83.2. One point of upside, several of exposure.
Common plus/minus convention; many schools use straight letters or different cut points.
You need 94% on the final.
That is within reach — the final is worth 20% of your grade.
🔢 Show the math
- Work graded so far covers 80% of the course; 20% is still to come.
- Points already banked: 89% × 80% = 71.2 points of the 100 available.
- To finish at 90% you still need 18.8 points from the remaining 20%.
- 18.8 ÷ 20 × 100 = 94% on what is left.
What you need, at every current grade
With a final worth 20% of your course grade and an A (90%) as the goal, this is the score you need on the final from each starting point:
| Current grade | You need on the final | Reachable? |
|---|---|---|
| 95% | 70.0% | Yes |
| 93% | 78.0% | Yes |
| 91% | 86.0% | Yes |
| 89% | 94.0% | Yes |
| 86% | 106.0% | Not with this final alone |
| 82% | 122.0% | Not with this final alone |
Grading scales vary by institution — your school's own table and syllabus govern. Conversions shown here follow common published conventions.
Frequently asked questions
Why is the downside larger than the upside here?
Because you are above your own average and the exam replaces a fifth of it. Everything from 89 to 100 buys you at most 2.2 points, while everything from 89 down to zero can take 17.8. Sitting near the top of a course makes a final an asymmetric bet in the wrong direction.
What is the worst grade I could finish with?
A blank paper leaves 71.2, which is a C-minus. That is not a realistic outcome for a student holding 89, but the middle of the range is: an unexpectedly hard paper answered at 75 finishes you at 86.2 — a B, with the A-minus and the B+ at 87 both gone. The realistic risk is a letter, not a catastrophe.
Is chasing the last point worth the hours?
That depends on what else those hours are holding up. A point at 89 is worth 0.4 grade points on a four-point scale if it changes the letter and nothing if it does not. A course where you are sitting near a boundary you can still reach usually has a better claim on the time.
How do I actually protect a grade this high?
By sitting the paper the way you sat the coursework that produced 89. The failure mode for strong students is not ignorance but pacing: too long on the first hard question, an unfinished section, a misread instruction. Practising under the real time limit addresses that; more content review usually does not.
Other targets
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