I Have a 82 in the Class — What Do I Need on the Final?
Going into the final with a 82%: if the final is worth the typical 20%, you need more than a perfect score (an A isn't reachable) and 72% 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 | 62% | Locked in ✓ | Locked in ✓ |
| 15% | Not possible | 68.7% | 2% | Locked in ✓ |
| 20% | Not possible | 72% | 22% | Locked in ✓ |
| 25% | Not possible | 74% | 34% | Locked in ✓ |
| 30% | Not possible | 75.3% | 42% | 8.7% |
| 40% | Not possible | 77% | 52% | 27% |
| 50% | 98% | 78% | 58% | 38% |
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 82% and a heavily weighted final, your ceiling is 91% (50% weight) to 83.8% (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.
Ask about rounding before finals week
An 89.5 is an A- in some classes and a B+ in others. Professors have wildly different rounding policies, and the polite time to ask is mid-semester, not the night grades post.
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.