Excel MMULT Function: Syntax, Examples & Tips

The MMULT function multiplies two arrays (matrices) in Excel, enabling advanced data analysis through matrix operations.
Excel
=MMULT(array1, array2)

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On this page
  1. Parameters
  2. What is an MMULT Formula in Excel?
  3. A Practical Example
  4. MMULT Formula
  5. Result of the Formula
  6. Why Use MMULT?
  7. Key Takeaways:
  8. Example use case

Parameters

array1:
The first array or range of cells that you want to multiply. This array must have the same number of columns as the number of rows in array2.

array2:
The second array or range of cells that you want to multiply. This array must have the same number of rows as the number of columns in array1.

What is an MMULT Formula in Excel?

The MMULT function in Excel is a powerful tool that allows you to perform matrix multiplication. It takes two arrays (or ranges) as input and returns the product of the two matrices. This function is particularly useful in advanced calculations, such as solving systems of equations or performing linear algebra operations.

In simpler terms, the MMULT function helps you multiply two sets of numbers in a structured way, making it easier to work with complex data.

A Practical Example

Imagine you are analyzing the performance of different products across various sales channels, and you have the following data in an Excel spreadsheet:

Sales Data Table:

ProductChannel AChannel B
Product 11020
Product 23040
Product 35060

You want to find the total sales for each product across both channels.

MMULT Formula

To calculate the total sales for each product, you would use the MMULT formula as follows:

Excel
=MMULT(B2:C4, TRANSPOSE({1;1}))

Breakdown of the Formula:

  • B2:C4: This is the range of the sales data for Channel A and Channel B.
  • TRANSPOSE({1;1}): This creates a vertical array of ones that allows the MMULT function to sum the sales across the two channels for each product.

Result of the Formula

When you apply the formula, it calculates the total sales for each product across both channels. The output would be:

Total Sales
30
70
110

Here, the total sales amounts are calculated as follows:

  • Product 1: 10 (Channel A) + 20 (Channel B) = 30
  • Product 2: 30 (Channel A) + 40 (Channel B) = 70
  • Product 3: 50 (Channel A) + 60 (Channel B) = 110

Why Use MMULT?

The MMULT function is particularly useful when you need to perform matrix operations without manually calculating each element. It allows you to efficiently handle complex data sets and perform advanced calculations that are essential in fields like finance, engineering, and data analysis.

Key Takeaways:

  • MMULT: Multiplies two arrays (or matrices) and returns the product.
  • Efficient Calculations: Helps you perform complex matrix operations without manual calculations.
  • Common Use Cases: Ideal for financial modeling, statistical analysis, and any scenario where matrix operations are required.

Understanding how to use the MMULT function can significantly enhance your data analysis capabilities in Excel, enabling you to perform sophisticated calculations with ease.

Happy calculating!

Example use case

You have a table where Column A contains the quantities of products sold by different sales representatives, and Columns B through D contain the prices of those products in different regions. You can use the MMULT function to calculate the total sales revenue generated by each sales representative across all regions. This allows for a quick assessment of overall performance and helps in strategizing sales efforts without the need for complex manual calculations.

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