How final grade calculator works
A final exam does not reset your grade — it blends with it. If the final is worth w% of the course, your current grade already locks in the other (100 − w)%. The score you need on the final is (target − current × (100 − w)) ÷ w. Example: with an 88 going into a final worth 30% and a target of 90% (an A−), the math is (90 − 88 × 0.7) ÷ 0.3 = 94.7 — you would need a 94.7% on the final.
Enter your current grade, the final’s weight from your syllabus, and a target — either a percent or a letter from A+ down to F. Letters map to the standard 13-step scale where A = 93%, A− = 90%, B+ = 87%, and F = below 60%. The calculator reports the exact score needed and flags two useful extremes: when the target is already secured (even a zero on the final keeps it) and when it is mathematically out of reach (you would need more than 100%).
The scenario table answers the reverse question: given each possible final-exam score, what course grade results? Scoring 80 on that 30% final turns the 88 into 85.6; scoring 100 turns it into 91.6. That turns one scary number into a range you can plan around, and it shows exactly how much each point on the final is worth: the final’s weight, nothing more.