Draw a table with two columns with one column contains values the other contains their weights. In the Insert Calculated Field dialog box please type Weight Average in the Name box type AmountWeight please change the formula based on your field names in the Formula box and then click the OK button. Unlike finding a single average where we used a one-column list of numbers to find a weighted average we need two sets of numbers.
Excel Weighted Average Formula.
To calculate the weighted average of a data with a Pivot Table we can add a column to our source data as an intermediate calculation. In Excel this can be represented with the generic formula below where weights and values are cell ranges. A weighted average on the other hand considers one or more numbers in the range to be worth more or have a greater weight than the other numbers. Select the cell where the weighted average should go for us thats cell D15 and then type the following formula into the function bar.