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How to Calculate Your Weighted Average Grade

Most educational assessments use weighted grading — different assignments, exams, and projects count for different proportions of the final grade. A simple average would be misleading if a final exam worth 50% is treated equally to a quiz worth 5%. Weighted average correctly scales each grade by its importance.

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Formula

$$Weighted\ Average = \frac{\sum (Grade_i \times Weight_i)}{\sum Weight_i}$$

Grade Calculator

Calculate your weighted average grade from multiple assessments.

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Worked Example

Given:

Grades = 85, 90, 78, 95Weights = 20%, 30%, 20%, 30%
ResultWeighted Average: 88.1% — Letter Grade: B

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FAQs

What if all my assessments have equal weight?

If all assessments have equal weight (or you leave weights blank), the calculator computes a simple arithmetic mean. This is equivalent to all weights being equal — for example, 25% each for four equally weighted assessments.

How does a final exam affect my overall grade?

A final exam worth 40% of your grade has a major impact. Scoring 60% on a 40-weight final pulls your average down significantly even if earlier grades were high. Conversely, a strong final exam performance can rescue a lower cumulative grade. Use the calculator to model 'what if' scenarios.

How do letter grade cutoffs typically work?

Standard letter grade cutoffs: A: 90–100%, B: 80–89%, C: 70–79%, D: 60–69%, F: below 60%. Some institutions use + and - grades (A+ = 97–100, A = 93–96, A- = 90–92). Cutoffs vary by institution — always check your course syllabus.