Weighted Average Calculator
Calculate a weighted average from values and their weights, with the simple average for comparison.
How to use it
- Enter each value The numbers you want to average.
- Add a weight to each How much each value should count.
- Read the result The weighted average and the simple one.
Examples
| 90×3, 80×1 | 87.5 |
|---|---|
| simple | 85 |
About this tool
A simple average treats every value equally, but often some count for more — a final exam worth more than a quiz, or a large purchase weighing on an average price. This calculator handles that by letting you assign a weight to each value.
It multiplies each value by its weight, adds them up and divides by the total weight, and shows the plain average alongside so you can see the difference. Add as many rows as you need; everything runs in your browser.
Frequently asked questions
How is a weighted average calculated?
Each value is multiplied by its weight, the products are summed, and the total is divided by the sum of the weights.
When should I use it?
Whenever items count unequally — grade components, weighted scores, blended rates or any average where some figures matter more.
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Updated June 15, 2026