How to Perform Matrix Multiplication in Excel (With Examples)

You can use the MMULT function in Excel to perform matrix multiplication.

This function uses the following basic syntax:

MMULT(array1, array2)

where:

The following examples show how to use the MMULT function to perform the following matrix multiplications in Excel:

Let’s jump in!

Example 1: (2×2) by (2×2) Matrix Multiplication

The following screenshot shows how to multiply a (2×2) matrix with another (2×2) matrix in Excel:

2x2 by 2x2 matrix multiplication in Excel

We typed the following formula in cell G2 to perform this matrix multiplication:

=MMULT(A2:B3, D2:E3)

Here are the actual formulas that Excel used to perform this matrix multiplication:

This results in the following 2×2 matrix:

The following screenshot shows how to multiply a (2×2) matrix with a (2×3) matrix in Excel:

We typed the following formula in cell H2 to perform this matrix multiplication:

=MMULT(A2:B3, D2:F3)

Here are the actual formulas that Excel used to perform this matrix multiplication:

This results in the following 2×3 matrix:

The following screenshot shows how to multiply a (3×3) matrix with a (3×2) matrix in Excel:

3x3 by 3x2 matrix multiplication in Excel

We typed the following formula in cell H2 to perform this matrix multiplication:

=MMULT(A2:C4, E2:F4)

Here are the actual formulas that Excel used to perform this matrix multiplication:

This results in the following 3×2 matrix:

Note: You can find the complete documentation for the MMULT function in Excel here.

The following tutorials explain how to perform other common tasks in Excel: