# Matrix Calculator

## Matrix Calculator

Welcome to the Desmos Matrix Calculator! Start with the video to the right, and then see how deep the rabbit hole goes with some of the tips below.

## Getting Started

Click “New Matrix” and then use the +/- buttons to add rows and columns. Then, type your values directly into the matrix.

Perform operations on your new matrix: Multiply by a scalar, square your matrix, find the inverse and transpose it. Note that the Desmos Matrix Calculator will give you a warning when you try to invert a singular matrix.

## Next Steps

You can use the Desmos Matrix Calculator to find the determinant of a square matrix.

You can also find the reduced row echelon format, or rref, of a matrix. This can be helpful in solving systems of equations.

## Multiple Matrices

Create multiple matrices and perform operations with them. Note that the Desmos Matrix Calculator will give a warning when trying to perform an operation on matrices with incompatible dimensions.

Besides using rref (as shown above), you can solve a system of equations using multiple matrices in a couple of different ways . Note that you can convert decimal results into fractions just like in the Desmos Scientific Calculator.

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