How to use the weighted average calculator
Compute a weighted average of scores. Enter values, weights in the fields above; the weighted average is computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- v — Values
- w — Weights
Worked example
With values = 90,80,70, weights = 0.5,0.3,0.2, the calculator gives weighted average ≈ 83.
Frequently asked questions
What is the formula for the weighted average calculation?
Weighted average = sum(v.map(function(a,i){return a × w[i]})) / sum(w). Here v is values, w is weights.
What inputs do I need for the weighted average (gpa) calculator?
You need values, weights. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.