Find the lowest score on the final that still clears the passing line for this class.
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Holding your current grade at 74 percent and the passing line at 60 percent, here is what the same back-solved formula returns as the final's weight changes. This table updates the logic, not your entries above; change your own numbers in the panel to see your own version.
Notice how much the required score climbs as the weight drops. At 10 or 15 percent, 74 already clears 60 overall without the final doing any work at all; by 40 percent, the final has to carry nearly as much as it is worth.
Your final grade is a weighted average of two numbers: what you have already earned, and what the final contributes. Written out, final grade equals current grade times the share of the course the final does not cover, plus the final's score times its own weight. The calculator rearranges that equation to isolate the one unknown, the exam score, given everything else you have entered.
Worked example. At 74 percent current, a 25 percent final, and a 60 percent passing line: the 75 percent already graded contributes 0.75 × 74 = 55.5 points. Reaching 60 overall means the final has to supply 60 minus 55.5, or 4.5 points, through its 25 percent share. Divide 4.5 by 0.25 and the final needs an 18. The same arithmetic run against 70, 80, and 90 gives the scores for a C, a B, and an A shown in the results panel; when a result comes back above 100, that target is not reachable from the final alone.
This tool has no idea whether your instructor drops a low quiz grade, grants extra credit, or curves the final itself; it only knows the three numbers you type in. Treat the result as the floor implied by your syllabus's stated weighting, not a guarantee, and recheck it the moment your current grade updates after any late assignment posts.
A negative or zero result means you have already secured the passing grade before the final even happens, since your current work times its share of the grade already clears the target on its own. A score of zero on the final would still leave you passing.
Because the final's weight is the denominator in the back-solved formula. A final worth 10 percent has to do far more per point to move your overall grade than a final worth 40 percent, so the same passing target needs a much higher score when the final counts for less.
No. It works from the raw numbers you enter: your current grade, the final's stated weight, and the passing threshold. If your instructor curves the final or the course, apply that curve to the result yourself, since the calculator has no way to know a curve exists.
Convert points to a percent of the total course grade first. If the final is worth 150 points out of a 750-point course, that is 20 percent, the number to enter in the weight field.