Weighted Average Calculator
CalculatorA weighted average calculator finds an average that accounts for the importance or weight of each value.
What is it
A weighted average is used when values do not all have the same importance. Multiply each value by its weight, add those products, then divide by the total weight.
weighted average = Σ(value × weight) / Σweight
How to use
- 1Multiply each value by its weight and add the products.
- 2Add all weights.
- 3Divide the weighted sum by the total weight.
Reference
| Value×weight sum | Weight sum | Weighted average |
|---|---|---|
| 450 | 10 | 45 |
| 275 | 5 | 55 |
Sources & standards
- MDN Web Docs: Client-side web APIs - MDN Web Docs
FAQ
When should I use a weighted average?
Use a weighted average when scores, ratings, or items have different levels of importance.
Is weighted average calculator input sent to a server?
No. This tool runs in your browser and does not send input to a server.