Final Grade Calculator
"What do I need on the final to get an 80?" is the most searched question of exam season, and the answer is one weighted-average formula away: needed = (target − current × (1 − final weight)) ÷ final weight. Enter three numbers — current grade, the final's worth, your target — and the big result is the exact score to aim for.
The scenario row answers the better question: what actually happens. It shows the course grade you'd land with 100%, 80% or 60% on the final, so you can see whether your target is safe, stretchy or gone — and decide where the study hours go. If the needed score is above 100%, the result says so honestly and shows the ceiling instead; if it's below 0%, your target is already locked even with a zero. Pair it with the GPA calculator to see what the outcome does to your semester.
How to use
- Enter your current grade, the final exam's weight (from the syllabus), and the course grade you're aiming for.
- Read the required final score in the big result — the formula line shows the exact calculation.
- Check the scenario row for 100%/80%/60% outcomes to decide how much this final is really worth to your week.
Frequently asked questions
What do I need on the final to get an 80?
With a 78 average and a 30% final: (80 − 78 × 0.70) ÷ 0.30 = 84.7%, so an 85 rounds to safe. The formula shifts fast with the final's weight — a 40% final needs only 82, a 20% final needs 96 — which is why the weight field matters more than intuition suggests.
How do I calculate my weighted final grade?
Course grade = current × (1 − final weight) + final score × final weight. The three scenario stats apply that formula at 100%, 80% and 60% so you can see the whole outcome range without retyping anything.
What if the needed score is over 100%?
Then the target is mathematically out of reach with your current average — the calculator shows the maximum course grade instead (a perfect final score). Lower the target one letter grade and the required score usually drops into reach; the recalculation is instant.
Does this work for points-based grading?
Yes — convert to percentages first: divide your earned points by possible points so far, and use the final's share of total points as its weight. After that the math is identical.