This free online grade calculator combines the scores and weights of multiple assessments, such as tests, homework, and exams, into one final weighted percentage and letter grade. Add each assessment's score and weight below to see where you stand.
How to Use the Grade Calculator
Enter the "Score (%)" you earned on each assessment.
Enter the "Weight (%)" that assessment counts toward your final grade.
Click "Add Assessment" to include more rows, or the × button to remove one.
Click "Calculate" to see your Final Grade and Letter Grade.
Worked Example: Standing Before the Final Exam
A course is graded on unit tests (20%), assignments (15%), a mid-term (25%) and a final exam (40%). Three components are already marked:
Assessment
Score (%)
Weight (%)
Score × weight
Unit tests
72
20
1,440
Assignments
90
15
1,350
Mid-term
65
25
1,625
Total
60
4,415
Entering only these three rows gives 4,415 ÷ 60 = 73.58%, a C. Because the tool divides by the total weight you entered rather than by 100, this is your average on the work graded so far, not a grade that treats the missing final as zero. Add the final as a fourth row once you have the mark: a score of 80 brings the course grade to 76.15%.
What Score Do I Need on the Final?
Required score = (target × 100 − sum of score × weight so far) ÷ weight of the final.
In the example above, reaching 75% overall needs (7,500 − 4,415) ÷ 40 = 77.13% on the final. Reaching 80%, a B, needs (8,000 − 4,415) ÷ 40 = 89.63%. If the answer comes out above 100, the target cannot be reached with the remaining weight. You can check any answer by entering it as the final row and confirming the result.
Getting an Accurate Result
Convert raw marks to percentages first. A test scored 18 out of 25 should be entered as 72, not 18.
Take the weights from your syllabus or course handbook. If your teacher drops the lowest quiz or caps a component, apply that before entering the numbers.
The letter grade uses a common 90/80/70/60 cut-off scale. Many Indian schools, boards and universities use their own grade bands, such as A1 to E or O to F on a 10-point scale, so map the final percentage to your institution's published scheme.
Weights do not have to add up to 100. Entering 2, 1 and 1 gives the same result as 50, 25 and 25.
Frequently Asked Questions
Each score is multiplied by its weight, those weighted values are added together, and the sum is divided by the total weight: Final Grade = ∑(score × weight) ÷ ∑(weight).
It maps your final percentage to A for 90% and above, B for 80-89%, C for 70-79%, D for 60-69%, and F for below 60%.
No. The calculator divides by the total of the weights you enter, so it rescales automatically. If you have only entered components worth 60% of the course, the result is your average on that 60%, which shows your current standing.
Multiply your target percentage by 100, subtract the sum of score × weight for the components already marked, and divide by the final exam's weight. For example, with 4,415 weighted points so far and a 40% final, a 75% target needs (7,500 − 4,415) ÷ 40 = 77.13%.
A simple average treats every assessment equally. A weighted grade gives more influence to the components that count more, so a strong final exam worth 40% lifts the result much more than a strong quiz worth 5%.