Weighted Score Calculator
A weighted score uses a value list and a corresponding weight list to calculate a weighted mean.
How to use this calculator
- Enter comma-separated scores and matching non-negative weights.
- Confirm that all inputs use the stated units and the same population, period or scope.
- Change one assumption at a time when comparing scenarios.
Formula used by the weighted score calculator calculator
Σ(scoreᵢ×weightᵢ)/Σweightᵢ
- Σ(scoreᵢ×weightᵢ)/Σweightᵢ
- Weights must align with scores and should reflect the intended scoring scheme.
- Inputs are validated against required ranges and outputs are rounded for readability.
Worked examples
Worked example
Scores 80, 90 and 75 with weights 20, 30 and 50.
The weighted score is 80.5.
The weighted score is 80.5.
Understanding the result
A weighted score uses a value list and a corresponding weight list to calculate a weighted mean.
Weights must align with scores and should reflect the intended scoring scheme.
Important notes
Weights must align with scores and should reflect the intended scoring scheme.
Use the result as a calculation aid for the inputs supplied; confirm critical specifications independently.
Frequently asked questions
Must weights add to 100?
No. Any consistent positive total works because the formula normalizes by total weight.
Can scores be percentages?
Yes, as long as the scores use a consistent scale.
How do I use this calculator?
Enter comma-separated scores and matching non-negative weights.
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Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
- How to Calculate a Z-Score — Learn how a z-score shows how far a value is from the mean in standard-deviation units.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.