Weighted mean calculator
Calculate a weighted average where each value has a different importance (weight). Common in GPA, grades, and portfolio returns.
Values
Weights
Weighted mean formula
WM = Σ(value × weight) / Σ(weights)
Values 80, 90, 70 with weights 0.3, 0.5, 0.2: (80×0.3 + 90×0.5 + 70×0.2) / (0.3+0.5+0.2) = (24+45+14)/1 = 83.
Common uses
GPA: Each course grade weighted by credit hours. Investments: Portfolio return weighted by allocation. Grades: Tests, homework, finals weighted differently.
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