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Weighted Average Calculator

Calculate a weighted average (weighted mean) from values and their weights — for grades, portfolios, prices and ratings.

Enter values

Separate values with commas, spaces or new lines.

Same number of weights as values. Percentages or any positive numbers.

Results update as you type.

Result

Weighted average

83.9

Simple average
82.333333
Sum of weights
1
Step-by-stepShow
  1. Σ(w·x) = 83.9
  2. Σw = 1
  3. 83.9 ÷ 1 = 83.9

About the Weighted Average Calculator

Calculate a weighted average (weighted mean) from values and their weights — for grades, portfolios, prices and ratings.

Also known as: weighted mean calculator, weighted mean, weighted grade, average with weights.

How to use this calculator

  1. Enter values, weights.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Open “Step-by-step” to see how the answer was worked out.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

x̄w = Σ(wᵢ·xᵢ) / Σwᵢ

Worked example

Using the values pre-filled in the calculator above:

  • Values: 90, 75, 82
  • Weights: 0.5, 0.3, 0.2

the calculator returns:

  • Weighted average: 83.9
  • Simple average: 82.333333
  • Sum of weights: 1

Working

  1. Σ(w·x) = 83.9
  2. Σw = 1
  3. 83.9 ÷ 1 = 83.9