I Have a 75 in the Class — What Do I Need on the Final?
Going into the final with a 75%: if the final is worth the typical 20%, you need more than a perfect score (an A isn't reachable) and 100% for a B. Every common weight is below — or set your exact numbers in the calculator.
Runs entirely in your browser — nothing is saved or sent anywhere.
What you need at every final-exam weight
| Final worth | For A | For B | For C | For Pass (D) |
|---|---|---|---|---|
| 10% | Not possible | Not possible | 25% | Locked in ✓ |
| 15% | Not possible | Not possible | 41.7% | Locked in ✓ |
| 20% | Not possible | 100% | 50% | Locked in ✓ |
| 25% | Not possible | 95% | 55% | 15% |
| 30% | Not possible | 91.7% | 58.3% | 25% |
| 40% | Not possible | 87.5% | 62.5% | 37.5% |
| 50% | Not possible | 85% | 65% | 45% |
Reading this table
"Locked in" means even a zero on the final keeps that grade. "Not possible" means a perfect final still wouldn't get you there — with a 75% and a heavily weighted final, your ceiling is 87.5% (50% weight) to 77.5% (10% weight). The math: needed = (target − current × (1 − weight)) ÷ weight.
Worth knowing
Confirm the scale in your syllabus
The 90/80/70/60 letter cutoffs used here are the most common US scale, but plenty of courses curve, use plus/minus bands differently, or set an A at 94. The syllabus — not any calculator — is the contract that counts.
The final isn't all-or-nothing
Because finals are usually worth 20–40%, your semester of work is protecting you more than you think. Run the numbers: the score you actually need is often lower — sometimes dramatically lower — than the panic estimate.
Common questions
Do these calculators store my grades?
No. Everything is computed in your browser the moment you press Calculate — nothing is uploaded, saved or seen by anyone else. Refresh the page and it's gone.
How are letter grades calculated from percentages?
Most US schools map percentages to letters in 10-point bands: 90–100 is an A range, 80–89 a B range, 70–79 a C range, 60–69 a D range, and below 60 an F. Plus/minus splits each band roughly in thirds (e.g. 90–92 = A-, 93–96 = A, 97+ = A+). Individual schools and professors can and do vary the cutoffs.