What Is a Weighted Average?
A weighted average is a mean in which some values count more than others, according to assigned weights. It is calculated by multiplying each value by its weight, adding the results, and dividing by the sum of the weights. Grade point averages and course grades are common examples.
Formula
Weighted average = Σ(value × weight) ÷ Σ(weights).
Example
Scores of 80 (weight 30%) and 90 (weight 70%) give 80 × 0.3 + 90 × 0.7 = 87.
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Last updated: September 27, 2026. This definition is for general educational purposes only. It is not financial, investment, tax, legal, or medical advice, and it does not recommend any product or course of action. For decisions about your own situation, consult a qualified professional.