Weighted Average Calculator
Calculate the weighted average of a set of values with their corresponding weights. Perfect for grades, financial portfolios, or any weighted data.
Published by:
isCalculator Editorial Team
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How to use this tool?
This calculator computes the weighted average of a set of values, where each value has a specific weight (importance). Follow these steps:
- Set the number of values – Enter a number between 1 and 20 in the "Number of Values" field. The input fields will update automatically.
- Enter your data – For each pair, input a value (e.g., 85) and its corresponding weight (e.g., 0.3). Weights can be any non-negative number (e.g., 0.3, 1, 2.5).
- Click "Calculate Weighted Average" – The result appears below, showing the weighted average, the formula used, and a step-by-step breakdown.
Important notes:
- All inputs accept decimal numbers. Use a period (.) as the decimal separator.
- Weights must be zero or positive. Negative weights are not allowed.
- The sum of all weights must be greater than zero; otherwise, an error is shown.
- The result is displayed rounded to four decimal places.
Previous Results
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Frequently Asked Questions
A weighted average is an average where each value is multiplied by a weight reflecting its importance, then summed and divided by the total weight.
Enter the number of values, then input each value and its corresponding weight. Click 'Calculate' to get the weighted average.
No, weights must be zero or positive. Negative weights are not allowed.
