Grade Calculator
Track where you stand in a course, and find out exactly what the final exam has to deliver.
Result
What this calculator does
A course grade is rarely a simple average. Homework might be worth 20%, the midterm 30% and the final 50% — so an outstanding homework score can matter far less than it feels like it should. Most students discover this the week before the exam, which is exactly the wrong time.
This calculator handles all three of the questions that come up. Add your marked work with its weights to see where you actually stand. Convert raw points into a percentage and a letter grade. And, most usefully, work backwards from the grade you want to the score the final exam has to deliver — including telling you honestly when the target is already out of reach.
How to use it
- On the Weighted grade tab, type each assignment with the score you got and what it is worth. Rows are pre-filled with a typical homework / midterm / final split.
- Leave the score empty for anything not yet marked. The calculator ignores it and tells you how much of the course has been graded so far.
- Use Points earned for a single test where you just want 42/50 turned into a percentage and letter grade.
- Use Final exam needed to work backwards: put in your current grade, your target, and what the final is worth.
The formula
Weighted grade = Σ(score × weight) ÷ Σ(weight)
Score needed on the final:
needed = (target − current × (1 − w)) ÷ w
where w = the final's weight as a decimal (40% → 0.4)
If needed comes out above 100 the target cannot be reached from the final alone. If it comes out at or below zero you have already secured the grade.
Worked examples
| Scenario | What you enter | Result |
|---|---|---|
| Homework 92% (20%), midterm 78% (30%), final 85% (50%) | Weighted | 84.3% — a B |
| Scored 42 out of 50 on a quiz | Points earned | 84% — a B |
| At 78%, want 85%, final worth 40% | Final needed | 95.5% on the final |
| At 92%, want 70%, final worth 20% | Final needed | Already secured — any score works |
| At 61%, want 90%, final worth 25% | Final needed | Not reachable: the best possible is 70.75% |
Frequently asked questions
A simple average treats every item as equally important. A weighted grade multiplies each score by how much that item counts, adds those up, and divides by the total weight. If your final is worth half the course, it pulls your grade twice as hard as a midterm worth a quarter. Almost every syllabus uses weighting, so the simple average is usually the wrong number.
That is fine and often correct mid-semester, because some work has not happened yet. The calculator divides by the weight actually graded, so it reports your standing on the part of the course that has been marked. It also shows what share of the course that represents, so you know how provisional the figure is.
It is exact arithmetic, given that your current grade and the final's weight are right. The two things that trip people up are using a current grade that already includes a provisional final mark, and syllabuses that drop the lowest quiz or replace a midterm with the final if it is higher. Check your syllabus for those rules before you trust the number.
The common US scale: 97+ A+, 93 A, 90 A−, 87 B+, 83 B, 80 B−, 77 C+, 73 C, 70 C−, 67 D+, 63 D, 60 D−, below 60 F. Institutions vary, particularly outside the US where 70% may already be a first-class mark. Use the percentage as the authoritative number and map it with your own school's table.
No — it is the grade-point value of this one course on a 4.0 scale. Your actual GPA is the credit-hour-weighted average across every course you have taken. To get it, work out the grade points for each course, multiply each by its credit hours, add them, and divide by your total credit hours.
The calculator says so plainly, and shows you the best grade still available. It is better to know in week ten than in week fifteen. At that point the useful conversations are about extra credit, a re-sit, or whether dropping the course before the deadline protects your transcript — all worth raising with your instructor early.
Your last ten calculations are saved in this browser and reachable from the History button, so you can reopen a recent one. The rows themselves are not stored permanently. If you are tracking a course all semester, use the Share button — it gives you a link with your numbers baked in that you can bookmark.
No. A row with no score is skipped completely rather than counted as zero, which would make your grade look far worse than it is. This is why the calculator also reports how much of the course has been graded — so you can tell the difference between “84% so far” and “84% final”.
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