Weighted Average Calculator
Average a list of values where each one carries a different weight or coefficient.
Results
Weighted average
16.6667
Total
6
Count
3
What this tool does
A weighted average lets some values count more than others, which is how school grades, portfolio returns and quality scores are usually combined. Enter the values in one box and their weights in the other, in the same order; the weights do not need to add up to anything in particular.
Formula
x̄ = Σ(xᵢ × wᵢ) ÷ Σwᵢ
Variables
| Symbol | Meaning | Unit |
|---|---|---|
numbers | Numbers (separated by comma, space or line) | — |
weights | Weights (same order) | — |
weighted_mean | Weighted average | — |
total_weight | Total | — |
count | Count | — |
Worked example
- Numbers (separated by comma, space or line)14, 16, 18
- Weights (same order)1, 2, 3
- Weighted average16.6667
- Total6
- Count3
Limitations
- The calculation runs at full precision and only the display is rounded. If you copy an intermediate value and retype it, small differences can appear.