⚖️ Weighted Mean Calculator
Calculate weighted averages effortlessly. Supply values and their corresponding weights to see the weighted mean, normalized weight shares, and contribution insights for each observation.
Dataset Input
Separate values and weights with commas, spaces, newlines, or tabs
Numeric data points you want to average.
Weights must be positive and match the count of values.
Weighted Mean
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Sum of Weights
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Weighted Sum
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Count
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Contribution Summary
No values analysed yet.
Insights
- No values analysed yet.
| Value | Weight | Weight Share | Contribution |
|---|---|---|---|
| No data yet. | |||
How to Use
- Paste values and weights. They must contain the same number of numeric entries.
- Click Calculate Weighted Mean to compute the weighted average and supporting metrics.
- Review the contribution table to understand each observation’s influence.
- Use the cleaning button to strip non-numeric entries; reset to start over.
Formula Reference
Weighted mean \( \bar{x}_w = \frac{\sum w_i x_i}{\sum w_i} \), where weights \( w_i > 0 \). Weight shares = \( \frac{w_i}{\sum w_j} \), contributions = weight share × value.