Most courses combine several assessments, each worth a different share of the final grade. Enter your score and the weight of each component to see your overall grade and exactly how every part contributes.
Enter the score for each component as a percentage.
Enter the weight of each component in the same order.
Read your overall course grade.
Weighted grade: Grade = Σ(score × weight) ÷ Σ weights
A course grade is rarely a single exam. It is usually built from assignments, quizzes, a mid-term, lab work and a final exam, each worth a set share. The weighted grade calculator combines your score in each component with its weight to give your overall course grade and an indicative letter.
College students use it to see where they stand mid-semester, to understand how internal assessment and end-semester marks combine, and to check a professor's calculation. Teachers use it to set up a grading scheme and test how different weights change results.
Enter scores as percentages and weights in the same order. If the weights do not add to 100, the calculator divides by whatever they total, so you can see your grade on the parts completed so far.
1. List every assessment component and its weight from the course outline.
2. Convert each score to a percentage: marks obtained ÷ maximum × 100.
3. Multiply each percentage by its weight.
4. Add all these products.
5. Add the weights.
6. Compute grade = Σ(score × weight) ÷ Σ weights.
7. Map the result to a letter using your institution's grading table.
If weights add to 100, dividing by 100 turns each into a fraction, and the grade is the sum of score × fraction. A final exam weighted 50% contributes half the course grade, so a 10-point change in the final moves the course grade by 5 points. A 10% quiz moves it by only 1 point. This proportional effect helps you decide where extra study time matters most.
Dividing by the total weight rather than always by 100 is what makes partial calculations meaningful. Suppose only assignments (20%) and a mid-term (30%) are done. Dividing their weighted sum by 50 gives your average on work completed so far. Dividing by 100 would instead show the points banked toward the final grade, which looks low simply because half the course has not been graded. Both are valid, but they answer different questions.
The letter shown uses a common 10-point band guide: 90 and above A+, 80 to 89 A, 70 to 79 B, and so on down to below 40 for F. Real institutions use many different tables, some with relative grading where letters depend on the class distribution. A weighted percentage of 79.6 might be a B here and an A elsewhere. Treat the letter as indicative and the percentage as the core result.
Sana's statistics course weights assignments at 15%, quizzes at 25%, a lab project at 10% and the final exam at 50%. She scored 78%, 64%, 88% and 71% in those components.
Multiply each score by its weight: 78 × 15 = 1,170 64 × 25 = 1,600 88 × 10 = 880 71 × 50 = 3,550
Weighted total: 1,170 + 1,600 + 880 + 3,550 = 7,200
Divide by total weight: 7,200 ÷ 100 = 72%
Answer: Overall grade 72%; Total weight used 100%
Entering raw marks, such as 18 out of 25, instead of converting to a percentage first.
Averaging component scores without weights.
Forgetting that a dropped lowest quiz changes the quiz average before weighting.
Assuming the letter band is the same as your university's grading table.
Tracking your course grade during the semester.
Combining internal assessment and end-semester marks.
Teachers testing a proposed weighting scheme before announcing it.
Deciding which remaining assessment deserves the most preparation.
What if my weights add up to less than 100?
The calculator divides by the weights you entered, so it shows your grade so far on the completed components.
Are the letter grades official?
They are a common 10-point band guide. Your institution's grading table decides the official letter.