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Calculate weighted average where different values have different importance. Perfect for grades, GPA, and weighted scores.
A weighted average (or weighted mean) gives different importance to different values. Each value is multiplied by its weight, then summed and divided by the total weight. This is essential when some data points matter more than others.
Calculate final grade with different category weights:
Different assignments, tests, and projects have different weights toward final grade.
Course grades weighted by credit hours to calculate overall GPA.
Investment returns weighted by dollar amount invested in each stock.
Star ratings weighted by number of reviews or reviewer credibility.
Example: Test scores 80, 90, 100
No! Weights can be any positive numbers. The formula divides by the sum of weights, so they automatically normalize. Weights of 20, 30, 50 work the same as 0.2, 0.3, 0.5 or 2, 3, 5.
List each category (homework, quizzes, tests, final) with your score and its weight. For example: Homework 85% (weight 20%), Quizzes 90% (weight 15%), Tests 88% (weight 40%), Final 92% (weight 25%).
Leave it out for now, or calculate what you need: If you have 70% so far (worth 60% of grade), you need X on the final (worth 40%). Set up: (70×0.6 + X×0.4) = desired final grade.
Yes, but a weight of zero means that value doesn't contribute to the average at all. It's essentially excluded from the calculation.
Each course grade is weighted by its credit hours. A 4.0 in a 4-credit course contributes more than a 4.0 in a 2-credit course: GPA = Σ(grade points × credits) ÷ Σ(credits).
A weight is the importance factor for each value (like 30% for a midterm). The weighted average is the final result after multiplying each value by its weight and dividing by total weight.