Excel Formula : SUMPRODUCT () for Advanced Users

When I first learned about the SUMPRODUCT  formula  in  Excel , I almost dismissed it as a useless  formula  used by only few users. How often would anyone need to multiply 2 or more groups of numbers together and add up the results!?

To get to the story, we know that formula is keyed in as:


This is the same as taking B3 and multiply it by C3, followed by next set and so on. Then, add up the total derived. The answer is 41.

How to use SUMIFS with multiple criteria in same column in Excel

Then I found out something really exciting about the formula! Unknown to many  Excel  users, the  formula  can actually be tweaked to sum up numbers based on condition(s), for instance, if you have a set of data and you are required to present the (sales) volume of Client A.

The formula can be entered by equating the ranges to conditions. For example, we can equate range A3 to A7 to A12 (which is Client A) and sum up the values in column B and C that correspond to the rows in Client A. The total is 11, based on the sum of the values in B3, C3, B6 and C6.

Thus, the formula is tweaked as follows to achieve this result:


Question, why do we have to use this if we can also achieve the same result with the SUMIF formula?

The reason is, unlike SUMIF, SUMPRODUCT is able to take in more than one condition! This is superb! We can sum up the values of either the pricing column or the volume column if the condition is added into the formula like this:


It will return 9, the total of 3 and 6 in C3 and C6 respectively.

The  formula  wowed me a great deal during the creation of the  Excel  Calendar. I was using Conditional Formatting to highlight individual cells with the help of VLOOKUP. But when I start to highlight a range of cells using a start date and end date, VLOOKUP fails. That was when I discovered the power of SUMPRODUCT formula which could help me work with multiple ranges and determine if the date falls within the range.

Conditional Formulas in Excel & Tricks Using the IF Function in Excel

It works so perfectly well because I can use one range to determine the open date and another range to determine the close date. Any date that falls outside of the ranges will not be highlighted.

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