Enter your current grade in the course, how much the final is worth, and the grade you want overall. The calculator returns the score you need on the exam.
Final exam grade calculator
Enter three numbers. Everything is a percentage.
Use your weighted current grade, with any missing work counted as zero — the article below explains how to get that number.
| To finish with | You need on the final |
|---|
Formula: (target − current × (1 − weight)) ÷ weight. Nothing you type is saved or sent anywhere.
Quick answer
– Required score = (target − current × (1 − weight)) ÷ weight. The calculator at the top of this page does it.
– Use your weighted grade, not the raw average, and enter outstanding work as zero.
– Run it for every course a fortnight out, and give the hours to whichever needs the most.
The formula
It’s simple enough to check by hand, which is worth doing at least once:
Required score = (target grade − current grade × (1 − exam weight)) ÷ exam weight
Where the exam weight is a decimal: a final worth 30% is 0.30.
Worked example
You have 88% in the course. The final is worth 30%. You want 90% overall.
- Everything before the final is 88 × 0.70 = 61.6
- You need 90 in total, so the final must supply 90 − 61.6 = 28.4
- The final is worth 30 points, so 28.4 ÷ 0.30 = 94.7%
Doable, but it means the exam has to go better than the semester did — which is exactly the kind of thing worth knowing two weeks out rather than the night before.
What the answer tells you
| Required score | What it means |
|---|---|
| Under 60% | The grade is banked. Don’t relax entirely, but redirect your hours to a course that needs them |
| 60–85% | Normal. Study as planned |
| 85–95% | This exam decides the grade. Prioritise it |
| Over 100% | Not reachable. Recalculate for the next grade down |
That last row is the useful one, and it’s why running this early matters. If an A needs 104%, you have a decision to make about where the week goes — and a B in that course plus an A in the one where you need 82% is a better outcome than losing both.
When the number is impossible
Chasing an impossible A usually costs you a comfortable B somewhere else.
- Check for extra credit. Ask now, not after the exam.
- Check the syllabus for a dropped grade. Many courses drop the lowest quiz or homework score, which changes your current grade.
- Check whether the final replaces a midterm. Some courses allow that, and it changes the arithmetic completely.
- Recalculate for the grade below and study accordingly. Chasing an impossible A usually costs you a comfortable B somewhere else.
- Talk to the professor. Before the exam, while options exist.
Before you trust the number
A few things throw the calculation off:
- Weighted categories. If your syllabus weights homework 20%, midterms 30% and the final 30%, your “current grade” needs to be the weighted figure, not a raw average of everything.
- Curves. If the course is curved, the number is an estimate.
- Ungraded work. Anything still outstanding changes the picture. Enter it as a zero if you’re deciding whether to bother submitting it.
- Rounding. Some instructors round 89.5 up, some don’t. Assume they don’t.
Planning the last two weeks
Once you know which exams are decisive, the fortnight plans itself — our finals week survival plan has the day-by-day version, and if it’s the studying rather than the arithmetic that’s the problem, study techniques that work is the place to start. Keeping exams and deadlines in one planner all term is what stops December being a surprise.
Once you know which exams are decisive, the finals fortnight plans itself. List every exam with the score you need, sort by how much work it will take to get there, and give the top of the list the most blocks.
Our finals week survival plan covers the fortnight in detail. For the term-level version, keep exams and assignments in one place with MyStudyLife so nothing is a surprise in December, and if it’s the studying rather than the scheduling that’s the problem, the study techniques guide is the place to start.
Working out your current grade first
The calculator needs an accurate starting figure, and “what the portal says” isn’t always it — gradebooks often exclude categories that haven’t started yet, which flatters your average.
To do it properly, take each category from the syllabus, work out your percentage within it, and multiply by its weight:
- Homework: 92% × 0.20 = 18.4
- Quizzes: 85% × 0.15 = 12.75
- Midterms: 81% × 0.35 = 28.35
- Running total out of the 70% graded so far: 59.5, which is 85% of what’s been assessed
That 85% is the number to put into the calculator, not the raw average of every score you’ve received.
Doing this for every course at once
Rank the courses by what the final can still move, then give the hours out in that order. Cornell’s Learning Strategies Center has the scheduling side of this, and the evidence on practice testing is what should happen inside each block.
The real value comes from running it across your whole schedule in one sitting, a fortnight before finals. Five courses, five required scores, and the plan for the next two weeks writes itself: the course needing 94% gets the most blocks, the one needing 58% gets the fewest.
Most students discover at least one course where the grade is already settled in one direction or the other, and redirecting those hours is usually worth more than any study technique.
Using it earlier than finals week
The calculator is most useful in week ten, not week fifteen. At that point the required score is still movable: there are assignments left, office hours to attend, and possibly extra credit on offer.
Run it once a month per course and you get an early-warning system. A course drifting from “needs 78%” to “needs 91%” over three weeks is telling you something specific about where your hours are going, and it’s telling you while there’s still time to redirect them.
A note on grade anxiety
The number this produces is information, not a verdict. Students who check a grade calculator obsessively during finals week usually find that the checking itself eats the hours that would have changed the answer.
Run it once, write the required score for each course on a piece of paper, plan the fortnight around those numbers, and then leave it alone until the grades post.
What this doesn’t tell you
The calculator answers a narrow arithmetic question, and it’s worth being clear about what sits outside it.
It doesn’t know whether the exam is curved, whether your professor rounds, or whether the final replaces a lower midterm. It doesn’t know that the 40% you scored on one quiz was a category your syllabus drops. And it can’t tell you whether a required 93% is realistic for you in this subject — only whether it’s arithmetically possible.
Use it to allocate your hours, then check the syllabus for the policies that change the picture, and ask your professor about anything ambiguous while there’s still time to act on the answer.
In short
Three numbers in, one out. Run it early enough that the answer can still change, sort your courses by what each exam needs, and spend the fortnight accordingly.
FAQ
How do I calculate what I need on my final exam?
Multiply your current grade by everything that isn’t the final, subtract that from your target, then divide by the final’s weight. The calculator at the top of this page does it for you.
What if my final is worth 20%?
The same formula with 0.20 as the weight. A lower weight means the final can move your grade less, in both directions.
Can a final exam really drop my grade a lot?
Yes, if it’s heavily weighted. A 40% final can move a course grade by a full letter or more.
What’s a weighted grade?
A grade where categories count for different proportions — homework 20%, midterms 40%, final 40%. Check your syllabus; the weights are always in there.
What if I have a zero for an assignment?
Include it. Zeroes damage averages more than poor scores, and the calculator should be run on the real numbers.
Does this work for high school?
Yes, as long as you know your current percentage and the exam’s weight. Some schools use semester exams worth 10 or 20% — the maths is the same.
