Weighted mean · data lists
Weighted mean · data lists: use values, weights. Review the formula, worked example and calculation steps.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
Weighted mean = Σ(xw)/Σw
Variables & units
- Values
- comma separated
- Weights
- comma separated
Worked example
80,90,100 weighted by 2,3,5 gives 93.
Assumptions
Weights are relative and need not add up to 100.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
Calculated on your device. Your latest 100 calculations stay in this browser.