Weighted Average Calculator
Calculate the weighted average of up to three values with custom weights. Compare with the simple average.
How to Use the Weighted Average Calculator
- Enter up to three values and their corresponding weights.
- Click Calculate to see the weighted and simple averages.
- Compare the two to understand the effect of weights.
快速参考
| 从 | 到 |
|---|---|
| 90×3, 80×2, 70×1 | 83.33 |
| 100×1, 50×1, 0×1 | 50 |
| 4.0×4, 3.0×3, 2.0×1 | 3.5 |
| Equal weights | Same as simple avg |
使用场景
- •Calculating GPA with different credit hours.
- •Computing portfolio returns with asset weights.
- •Averaging survey scores with response counts.
公式
Weighted average = Σ(value_i × weight_i) / Σ(weight_i). All weights must be non-negative.
常见问题
What is a weighted average?
An average where each value contributes proportionally to its assigned weight, giving more importance to higher-weighted values.
How is it different from a simple average?
A simple average treats all values equally; a weighted average gives different importance to each value.
Can weights be zero?
Yes, a weight of zero means that value is excluded from the calculation.