Final Exam Calculator

Your course grade is already partly decided. Whatever you have earned so far counts for everything except the final's share, and the exam fills in the rest:

needed = (target − current × (1 − weight)) ÷ weight

With an 85 going into a final worth 20%, your existing work already locks in 85 × 0.8 = 68 points of the final total. Wanting a 90 means the exam has to supply the remaining 22 out of the 20 points it controls — which is 110%, and therefore impossible. Aim at an 87 instead and the exam needs 95%. Aim at 80 and it needs only 60%.

That steep jump between targets is the part most people have not internalised, and it is why the table above lists every letter grade at once rather than making you guess one target at a time.

A heavy final cuts both ways, and the asymmetry surprises people. When the exam is worth 40%, a student sitting at 78 who needs a 70 to pass only has to score 58% — the exam is big enough to carry them. The same weight means a strong student can lose a letter grade in two hours.

When the exam is worth 10%, the opposite holds: your grade is essentially already set, and the final can only nudge it. If the number this page returns looks shocking in either direction, check the weight first — it is the input people most often get wrong, usually by reading a category total instead of the exam's own row.

Current grade. In Canvas this is the total percentage at the top of the Grades page for that course. Blackboard, Moodle and PowerSchool all show an equivalent running total. One caution: that figure usually reflects only graded work, so if several assignments are still ungraded your real standing may be lower than it looks.

The final's weight. This comes from the syllabus, not the gradebook — look for the table of assignment groups and read the percentage on the row naming the final. If your course is scored in points rather than percentages, divide the final's points by the course's total points. A 200-point final in a 1,000-point course is 20%.

Plenty of calculators quietly cap their answer at 100. That hides the only thing you actually needed to know. A required score of 105% and one of 160% are very different situations: the first is worth an email to your instructor about outstanding work, the second means it is time to aim at the next grade down and protect it.

The reverse case is worth checking too. If the required score comes out at zero or below, the grade is already secured — even a blank exam leaves you at or above your target. Students sitting on a comfortable margin before a lightly weighted final are often in this position without realising it.

This page assumes you already have one overall percentage. If you do not — or if your course splits work into weighted categories like homework, quizzes and exams and you want to see how each one contributes — build the number up first with the Canvas grade calculator, then bring the result back here.

For a deeper read on the reasoning behind this calculation, including why a target can slip out of reach sooner than expected, see the guide on passing your final. To test a hypothetical score on work that has not been graded yet, rather than solving for one, use the what-if calculator.