Weighted Average Calculator
Find the weighted average when some values count more than others.
Calculate
Enter your values below.
Result
Weighted average
0
Formula used
Weighted average = Σ(value × weight) ÷ Σ(weight)
Example: Values 80, 90, 70 with weights 1, 3, 2 → weighted average = 83.33.
How to use this calculator
- Enter Values (comma-separated), Weights (comma-separated).
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
What is a weighted average?
An average where some values contribute more than others, based on an assigned weight.
Do the weights need to add up to 100?
No, weights can be any positive numbers — only their relative size matters.
What if I enter a different number of values and weights?
Each value must have a matching weight in the same position; mismatched lists will produce an error.
Where is weighted average used?
Common uses include grade calculations, investment portfolio returns, and survey scoring.