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Weighted Grade Calculator by Percentage

Calculate a weighted final grade from scores and percentages and review each assessment's contribution.

Calculated locallyYour grades stay in your browser.

Calculate the weighted average

Weighted average

75 / 100

Evaluated weight

30%

Remaining weight

70%

Contribution to final grade

22.5

Full calculation

75 × 30% = 22.5

How it works

  1. Set the maximum value of your grading scale.
  2. Add each assessment with its grade and percentage weight.
  3. Check that the weights match your course syllabus.
  4. Review the accumulated contribution, evaluated weight and normalized weighted average.

Practical example

Suppose homework is 87% with a 15% weight, the midterm is 73% with a 30% weight, the project is 92% with a 20% weight, and quizzes are 84% with a 10% weight. Their weighted contributions are 13.05, 21.9, 18.4 and 8.4 points. Together they contribute 61.75 points across the 75% evaluated so far, giving a current normalized weighted grade of 82.33%.

Formula and explanation

Apply the formula to every row: weighted contribution = grade × weight ÷ 100. For example, a grade of 87% with a 15% weight contributes 13.05 points to the course grade. Add all assessment contributions to obtain the weighted grade.

When the weights total 100%, that sum is the complete weighted final grade. If they total less than 100%, the accumulated contribution shows the course points earned so far, while the normalized average describes only the assessed work; the remaining percentage is not treated as a zero. If weights exceed 100%, check the percentages entered.

Frequently asked questions

Must weights total 100%?

They should for a complete final grade. With less weight, the tool also shows a normalized partial average.

Can I use decimals?

Yes. Both decimal points and commas are accepted.

How is this different from a simple average?

In a weighted average, assessments with a larger percentage have more influence.