Add your assignments below.
Score accepts 88/100 or just 88 for a percentage. Leave Weight blank if your class is points-based.
What do I need on the final?
Fill in your assignments above to see what the final needs to be.
How this grade calculator works
Most classes are graded one of two ways, and which one yours uses changes the arithmetic completely. This calculator handles both, and switches between them automatically depending on what you enter.
Fill in the weight column and it treats your class as weighted. Leave the weights blank and it totals points earned against points possible. Mix the two — some categories weighted, some not — and it handles that as well, which is closer to how a lot of real syllabuses are actually written.
Weighted classes
Your syllabus lists categories with percentages — homework 20%, midterm 30%, final 50%. Weight decides impact, not size.
Points-based classes
Everything is worth points and they simply add up. A 200-point project matters twice as much as a 100-point one.
Mixed
Some categories weighted, the rest pooled. The calculator treats the unweighted rows as one block filling the leftover weight.
Not sure which?
Look for percentages next to categories on your syllabus. If they are there, it is weighted. If it is just point values, it is not.
The two formulas
points-based: grade = total points earned ÷ total points possible × 100 weighted: grade = Σ (category percentage × weight) ÷ Σ (weight)
That second denominator is the part people get wrong. Dividing by the weight actually used rather than by 100 gives you your grade in the work graded so far. Dividing by 100 would silently count every ungraded assignment as a zero — which is why some grade calculators give people a heart attack in week four.
Worked example
Homework is worth 20% of the course and you scored 88 out of 100. The midterm is worth 30% and you scored 74. Nothing else has been graded.
| Category | Score | Weight | Contribution |
|---|---|---|---|
| Homework | 88% | 20% | 88 × 20 = 1,760 |
| Midterm | 74% | 30% | 74 × 30 = 2,220 |
| Total | — | 50% | 3,980 |
3,980 ÷ 50 = 79.60%, which is a C+ on the common US scale. Note the divisor: 50, not 100. This is your grade in the half of the course that has been graded — not a prediction of where you will finish.
Why weight matters more than size
A 10-point quiz inside a category worth 40% of your grade moves your final mark more than a 100-point project inside a category worth 5%. This is genuinely counter-intuitive and it is the reason students misallocate effort.
Before you decide what to work on, check which category it falls into and what that category is worth. The size of the assignment tells you how long it will take; the weight tells you whether it matters.
The letter grade scale
| Percentage | Letter | Typical GPA point |
|---|---|---|
| 97–100 | A+ | 4.0 |
| 93–96 | A | 4.0 |
| 90–92 | A− | 3.7 |
| 87–89 | B+ | 3.3 |
| 83–86 | B | 3.0 |
| 80–82 | B− | 2.7 |
| 77–79 | C+ | 2.3 |
| 73–76 | C | 2.0 |
| 70–72 | C− | 1.7 |
| 67–69 | D+ | 1.3 |
| 63–66 | D | 1.0 |
| 60–62 | D− | 0.7 |
| Below 60 | F | 0.0 |
This is the most widely used US scale, but it is a convention rather than a standard. Plenty of schools do not use plus and minus grades at all, some set the A boundary at 92 or 94, and international systems differ entirely. Your syllabus is the authority.
What this calculator does not apply
Extra credit
If your instructor has already applied it, fold it into the score you enter. The calculator has no way to know about it otherwise.
Curves
A curve is applied to the class after grading. Nothing here predicts one.
Dropped lowest score
Common on homework categories. Leave the dropped assignment out entirely rather than entering a zero.
Attendance and participation
If they carry weight on your syllabus, add them as their own category.
Late penalties
Enter the score after the penalty was applied, not before.
Rounding policy
Some instructors round 89.5 up to an A−, some do not. That is a policy question, not a maths one.
Using it through the semester
Set it up in week one
Enter every category from the syllabus with its weight and no score. You will immediately see what the course is actually made of.
Fill scores in as they arrive
The running figure tells you where you stand, and the weight column tells you what is still up for grabs.
Check before the drop deadline
This is the moment the number is genuinely decision-relevant. It is worth ten minutes.
Switch to the final grade calculator near the end
Once only the final remains, the useful question changes from “where am I” to “what do I need”. Use the Final Grade Calculator for that.
The honest summary
A grade calculator does not change your grade. What it changes is whether you are guessing.
The students who use one early tend to make better decisions about where to spend effort — not because the number motivates them, but because it shows which assignments actually move it.
Frequently asked questions
How do I calculate my grade with weights?
Multiply each assignment percentage by its weight, add those together, then divide by the total weight used. The calculator does this as you type, and shows the weight used so you can see how much of the course has been graded.
What if my weights do not add up to 100?
That is completely normal mid-semester — it means some work is not graded yet. The calculator divides by the weight actually used, so you get your grade in the work graded so far rather than a figure that silently counts ungraded assignments as zeros.
What do I need on the final to get an A?
Enter 90 as your target, along with the final exam weight, and the calculator works it out. If the answer comes back above 100, it tells you the highest grade still reachable instead.
Can I use this for a points-based class?
Yes. Leave the weight column blank and it totals points earned against points possible. If some categories are weighted and others are not, it handles the mix too.
How do I enter a score?
Either as 88/100, or as a plain 88 for a straight percentage. Both work in the same field, so you can enter marks in whichever form your syllabus uses.
Does it save my grades?
No. Everything runs in your browser and nothing is stored or sent anywhere. Close the tab and it is gone.
Why does a small quiz affect my grade so much?
Because weight decides impact, not size. A 10-point quiz inside a category worth 40% of the course moves your grade more than a 100-point project inside a category worth 5%.
Is the letter scale the same everywhere?
No. The scale here follows the most common US convention, but schools differ — some do not use plus and minus grades, some set the A boundary at 92 or 94, and international systems are different entirely. Your syllabus is the authority.
What about extra credit or a curve?
Neither is applied automatically. If extra credit has already been added to a score, enter the adjusted figure. A curve is applied by your instructor after grading and nothing here predicts it.
When is the best time to use this?
Set it up in week one with every category from the syllabus, then fill in scores as they arrive. The figure is most decision-relevant just before the drop deadline.
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