Statistics calculator

Weighted Average Calculator

Calculate a weighted average from three values and their weights.

FormulaWeighted average = sum(value x weight) / sum(weights)

Formula

Weighted average

Weighted average = sum(value x weight) / sum(weights)

Scores weighted 40, 35, and 25 percent combine into one weighted score.

FAQ6 common questions for this calculator.

FAQs

Do weights need to add to 100?+

No. The calculator divides by the total weight entered.

Can weights be zero?+

Yes. A zero-weight value does not affect the average.

How does the Weighted Average Calculator calculate the result?+

For the Weighted Average Calculator, it uses the Weighted average: Weighted average = sum(value x weight) / sum(weights). Scores weighted 40, 35, and 25 percent combine into one weighted score.

What information do I need to use the Weighted Average Calculator?+

For the Weighted Average Calculator, enter three values and their weights. Keep the units consistent with the calculator fields and compare your setup with the worked example on the page.

How accurate is the Weighted Average Calculator?+

Weighted Average Calculator calculates the selected statistic from the sample values provided. It uses the Weighted average, but missing data, outliers, sample bias, and distribution assumptions can affect what the result means.

What should I check before using the Weighted Average Calculator result?+

For the Weighted Average Calculator, check three values and their weights, sample definition, missing values, outliers, and rounding precision. A statistic can be numerically correct but still describe a weak sample.

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Statistics guide

How to use the Weighted Average Calculator

Calculate a weighted average from three values and their weights. The page also explains the weighted average and shows a practical example: Scores weighted 40, 35, and 25 percent combine into one weighted score.

  1. 1

    Enter your details

    Enter three values and their weights, then complete any other fields shown in the calculator.

  2. 2

    Check the calculation

    Review the result alongside the weighted average: Weighted average = sum(value x weight) / sum(weights).

  3. 3

    Compare scenarios

    Change one or more inputs to see how they affect the weighted Average Calculator result before you use the estimate.