Calculate a weighted average from two values and their weights, useful when the values contribute unequally.
Fill in the details and click Calculate to see your results.
A weighted average gives different values different influence according to their weights.
Weights can be percentages, marks weights or other relative values. They do not have to add to 100 as long as the relative proportions are correct.
| Value A | 80 |
| Weight A | 40 |
| Value B | 90 |
| Weight B | 60 |
| Weighted Average | 86 |
| Total Weight | 100 |
| A Contribution | 32 |
| B Contribution | 54 |
An 80 score weighted 40 and a 90 score weighted 60 give a weighted average of 86.
Try this example →No. Only their relative proportions matter, although percentage weights commonly add to 100.
A weighted average is undefined when the total weight is zero; the current engine returns 0 for division by zero.