Grade Calculator
Calculate your weighted overall grade from scores and their weights.
Was this tool helpful?
Thanks for the feedback!
This grade calculator works out your weighted course grade when assignments, quizzes and exams count for different amounts. List each score with its weight, one pair per line, and it returns the weighted percentage, a letter grade and the total weight you entered.
Entering scores and weights
Each line of the box holds one assessment as score,weight. Scores should be percentages. Weights are the share of the course each item is worth. The placeholder shows the format:
85,30 90,20 78,50
A tab also works as the separator, so you can copy two adjacent columns (score and weight) from Excel or Google Sheets and paste them straight in. Semicolons do not work: a line like 85;30 is read as a score with no weight and the tool reports that the total weight is zero.
How the weighted grade is calculated
Weighted grade = Σ(score × weight) ÷ Σ weight. For the three lines above:
- 85 × 30 = 2,550
- 90 × 20 = 1,800
- 78 × 50 = 3,900
The products add up to 8,250 and the weights to 100, so the result is 82.5%, letter grade B, total weight 100%. A plain average of 85, 90 and 78 would be 84.33%, which overstates the grade because the weakest score belongs to the item worth half the course.
Checking your standing mid-semester
Because the tool divides by the weights you actually entered, the weights do not have to reach 100. If only the first two items are graded, enter 85,30 and 90,20: the result is 87% with a total weight of 50%. That is your current average on the half of the course completed so far, which is exactly the number the final grade calculator needs as its "current grade" when the remaining 50% is a single final exam.
Weights written as decimals give the same grade: 0.3, 0.2 and 0.5 also produce 82.5%, although the total weight line will then read 1% instead of 100%.
The letter grade scale used
| Weighted % | Letter |
|---|---|
| 90 or more | A |
| 80 to below 90 | B |
| 70 to below 80 | C |
| 60 to below 70 | D |
| Below 60 | F |
This is the common ten-point scale used by many US schools. It has no plus or minus grades, and Indian universities that grade on a 10-point CBCS scale convert differently, so rely on your syllabus for the official letter.
Mistakes to avoid
- Raw marks instead of percentages. A quiz scored 34 out of 40 should be entered as 85, not 34.
- A line with no weight. A line containing only a score gets weight 0 and has no effect on the result.
- Counting an item twice. If your portal lists "Assignments (20%)" as an average, enter that average once rather than each assignment at 20.
To average semester grade points rather than percentages, use the GPA calculator.