A clear answer before the details
A weighted grade gives each score an influence based on its percentage of the course. Multiply each score by its weight, add the products, and divide by the total weight.
Calculate a grade when assignments have different weights
A weighted grade calculator is more accurate than a plain average when homework, quizzes, projects, and exams count differently. Multiply every score by its course weight, add the contributions, and divide by the total weight. For example, a 90% exam worth 40% contributes 36 percentage points. Enter the values and weights in matching order so the grade calculator with weights can show the full substitution.
Find the final exam score needed
The final grade calculator mode works backward from a target overall grade. It combines the current grade with the completed portion of the course, then solves for the score required on the final assessment. If the answer is above 100%, the target cannot be reached under the entered grading scheme; if it is below 0%, the target has already been met. This makes the tool useful as a college grade calculator, provided your course uses percentage weights rather than a separate GPA conversion.
Formula guide
The key equations are separated below. Start with the calculator mode, then choose the shape or model that matches your problem.
Weighted grade
Weighted average
Use matching score and weight lists.
Score contribution
A 90% score worth 30% contributes 27 percentage points.
Final projection
Required final score
T is the target, C is the current grade, w is completed weight, and f is final weight.
Worked example
Scores of 80, 90, and 100 with weights 20%, 30%, and 50% give 16 + 27 + 50 = 93%, so the weighted grade is 93%.
Formulas for common use cases
Use the matching equation for the problem you are solving, then enter its variables in the calculator above.
Assignment weights
Use weights as percentages of the entire course.
Final grade projection
Convert percentage weights to decimals before multiplying.
Reach a target
A result over 100% means the target is unreachable with the entered weights.
How to use this calculator
- Choose weighted grade or final-grade projection.
- Enter percentages and weights as matching lists, or enter your current and target grades.
- Review the substituted formula and the contribution of each score.
- Check that weights describe the same grading scheme used by your school or course.
Where it helps
A grade calculator with weights is useful for college courses, high-school classes, certification exams, and any rubric where homework, quizzes, projects, and exams have different importance. The final grade calculator mode works backward from a target: it tells you the required final-exam score and warns when the target is above 100% or already secured. Use percentage points consistently, and enter completed and final weights as percentages of the whole course.
Common mistakes
Weights should be percentages of the full grade, not arbitrary numbers unless their total is intentionally normalised. Do not average assignment percentages when their weights differ. A required score above 100% means the target is not reachable under the entered weights; a negative required score means the target has already been reached.