Do my weights need to add up to 100 exactly?

Our calculator automatically normalizes weights by dividing by the sum of weights, but using 100% is standard practice.

Can I calculate grade point average using this tool?

Yes, if you enter grade points as scores and course credits as weights, it computes your exact GPA.

Student Tools

Average Marks Calculator

Calculate simple arithmetic average or weighted average marks across assignments, tests, and semester courses.

Calculation Type:

Item #1 Marks

Weight / %

Item #2 Marks

Weight / %

Item #3 Marks

Weight / %

Weighted Average Marks

Calculated using sum of (Marks × Weight) / Total Weights (100).

Arithmetic Mean & Weighted Average Formulas

Computes simple average score or weighted average marks when exams and assignments carry different percentage contributions.

Simple Average = Sum(Marks) / N | Weighted Average = Sum(Marks * Weight) / Sum(Weights)

Calculation Steps

1Enter the score and weight for each assessment or subject.
2For simple average, sum all scores and divide by total subject count.
3For weighted average, multiply each score by its assigned weight, sum the products, and divide by the total weight sum.

Practical Example

Scenario: Assignments (Weight 20%, Score 85), Midterm (Weight 30%, Score 75), Final Exam (Weight 50%, Score 90)

Inputs: Assessment weights: 20%, 30%, 50% | Scores: 85, 75, 90

Calculation: (85 * 20 + 75 * 30 + 90 * 50) / 100 = (1700 + 2250 + 4500) / 100 = 8450 / 100 = 84.50

Result: Weighted Average Mark: 84.50%

Assumptions & Disclaimers

Key Assumptions:

Weights are positive numbers summing to 100% (or normalized automatically).
All scores are on the same numerical scale.

Institutional grading schemes may include curve normalization or relative grading percentiles not captured by simple arithmetic means.

Frequently Asked Questions

A simple average treats every exam equally. A weighted average gives more importance to exams that carry higher percentage value (like finals vs weekly quizzes).