Weighted Grade Calculator

Calculate weighted grades, assignment averages, exam contributions, and final course scores.

Weighted Grade Calculator

Calculate an overall grade when different assignments count for different shares of the total. Enter each score with its weight and the calculator returns the weighted average, which is how most syllabi actually compute a course grade.

Weighted average formula

A weighted grade multiplies each score by its weight and adds the results:

weighted grade = sum(score x weight) / sum(weights)

When the weights already sum to 100% (or 1 as decimals), the denominator is 1 and the formula reduces to sum(score x weight). The difference from a simple average is that a simple average treats every item equally, while a weighted average lets a 30% final exam move the grade three times as much as a 10% quiz. If only part of the course is graded so far, dividing by the sum of the completed weights gives your current standing rather than a number dragged down by work that has not happened yet.

Worked example

A literature course is graded as essays 40%, participation 10%, midterm 20%, and final exam 30%. A student has an essay average of 88, a participation score of 95, a 76 on the midterm, and an 84 on the final:

  • Essays: 88 x 0.40 = 35.2
  • Participation: 95 x 0.10 = 9.5
  • Midterm: 76 x 0.20 = 15.2
  • Final exam: 84 x 0.30 = 25.2

The weighted grade is 35.2 + 9.5 + 15.2 + 25.2 = 85.1%. A simple average of the same four scores would be (88 + 95 + 76 + 84) / 4 = 343 / 4 = 85.75% — close in this case, but the weighted number is the one on the grade report, and the gap widens whenever a heavily weighted category diverges from the rest.

When to use this calculator

  • Translating a syllabus's category weights and your returned scores into the single percentage that determines your letter grade.
  • Comparing strategies before finals: seeing whether raising an essay average or the exam score moves the total more per point of effort.
  • Recomputing your grade when an instructor reweights categories mid-semester, for example after cancelling a quiz.
  • Projecting end-of-term outcomes by plugging in estimated scores for work that is still outstanding.

Tips for accurate results

  • Check that the weights sum to 100%; a missing category silently distorts every result.
  • Average multiple scores within a category before applying the category weight once.
  • Enter scores as percentages when assignments have different point totals — 45 out of 50 is 90, not 45.
  • Watch for syllabus rules like dropped lowest scores or a final that can replace the midterm; apply them before weighting.
  • Weights, not point values, determine influence: a 200-point project in a 10% category still only moves 10% of the grade.

Related calculators

For the semester-level view across whole courses, see the CGPA calculator. The fraction calculator and proportion calculator help with the underlying arithmetic, while the study time calculator and 2D shapes calculator support planning and geometry coursework.

Frequently asked questions

What is a weighted grade?
A weighted grade multiplies each score by the share of the course it represents and sums the results, so a 30% final exam influences the total three times as much as a 10% quiz. This differs from a simple average, which treats every item equally. Most course syllabi define grades this way.
What happens if my weights do not add up to 100%?
The calculator divides by the sum of the weights you enter, which effectively rescales them. That is useful mid-semester when only part of the course is graded, but for a final grade a missing category means the result will not match your transcript. Double-check the weights against the syllabus.
How do I handle several assignments in the same category?
Average the scores within the category first, then apply the category weight once to that average. Applying the full weight to each assignment separately overcounts the category. If your instructor drops the lowest score, remove it before averaging.
Should I enter raw points or percentages?
Enter percentages whenever assignments have different point totals, since 45 out of 50 is a 90%, not a 45. Raw points only work if every item in the comparison is out of the same total. Within a weighted system, weights determine influence, so a 200-point project in a 10% category still moves only 10% of the grade.
Why does my weighted grade differ from a simple average of my scores?
Because the categories where you scored higher or lower do not carry equal weight. A student with essay scores of 88, participation of 95, a 76 midterm, and an 84 final averages 85.75% unweighted, but only 85.1% when weighted 40/10/20/30, since the weak midterm counts double the strong participation score. The weighted number is the one instructors report.
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