Grade Calculator
Add your assignments, quizzes and exams — one per line with the score, the maximum and the weight — and get your weighted course grade, the letter grade it falls in, and each item's contribution to the total.
Formula and calculation
Worked example
For a 10%-weighted homework (18/20), a 20% quiz (8/10), a 30% midterm (85/100) and a 40% final (76/100), the weighted total is 80.9% — a B-. Graded on raw points alone, the same scores would be 81.3%.
Weighting versus raw points
Weighting can move your grade in either direction, so it is worth knowing which way. In the example above the midterm and final were the weakest scores and they carry 70% of the grade, which drags the total below the raw-points number. Flip it — strong exams, weak homework — and weighting pushes the same scores up. That is also why a low quiz score usually matters less than it feels: in a class where quizzes are 10%, all you lose is 10% of the gap between that quiz and your average. Items you have not been given back yet should be left out entirely rather than guessed, because a missing item changes the total weight.
What the results mean
- Weighted total
- Your grade as a percentage, weighted by each item's weight. This is the number that ends up on the report card for a course graded this way.
- Letter grade
- The letter your percentage falls in on the selected scale. Cutoffs vary between schools and even between departments, so treat a grade sitting right on a boundary as uncertain.
- Points earned
- Every score added up, ignoring the maximums — the raw points you have earned so far.
- Points possible
- Every maximum added up — the raw points that were available.
- Points-based total
- Points earned divided by points possible. When no weights are used this is the same as the weighted total; when weights are used, comparing the two shows how much the weighting helps or hurts.
- Items counted
- How many lines were counted — blank lines are ignored.
- Total weight used
- The weights added up. If your weights come to 100 this reads 100; if they do not, the weighted total is divided by this number, so weights of 2/3/5 and 20/30/50 give the same grade.
Frequently asked questions
How do I calculate my weighted grade?
Convert each item to a percentage (score ÷ maximum), multiply it by that item's weight, add those numbers up, and divide by the total weight. With homework at 10% (90%), a quiz at 20% (80%) and a final at 70% (70%), the total is 0.1×90 + 0.2×80 + 0.7×70 = 74%.
What if my weights don't add up to 100%?
The calculator divides by whatever your weights add up to, so weights of 2/3/5 mean the same thing as 20/30/50. That is useful when your syllabus lists points rather than percentages — enter each category's points as the weight.
How do I handle extra credit?
Enter a score above the maximum: a line like “Extra credit, 105, 100, 10” gives that item 105%. A score above the maximum in a heavily weighted category can push the weighted total past 100%, which is what most extra-credit policies are meant to do.
Should I include assignments that were excused or dropped?
Leave them out. A dropped or excused item contributes no points but still counts toward the total weight if you enter it, which understates your grade. Only enter work that counts toward the final grade.
Which letter grade scale should I choose?
Use the scale your school publishes: many US colleges use the plus/minus scale (A− 90, B+ 87, B 83, B− 80), while many high schools and districts use the simple 90/80/70/60 scale. If your syllabus has custom cutoffs, use this calculator for the percentage and read the cutoff off the syllabus.