Matrix Calculator

How to use it

1. 1

   Choose the operation

   Pick add, subtract, multiply, determinant, inverse or transpose. The grids adjust to what the operation needs.

2. 2

   Enter the values

   Fill in each cell. For two-matrix operations, the second grid sizes itself to keep the operation valid.

3. 3

   Read the result

   See the resulting matrix or value, computed exactly, with a note when an operation is not possible.

When it comes in handy

Frequently asked questions

How do you multiply two matrices?

Each entry of the result is the dot product of a row from the first matrix and a column from the second, so the first matrix must have as many columns as the second has rows. The calculator checks this and shows the product when the sizes match.

What is a determinant?

The determinant is a single number computed from a square matrix that tells you, among other things, whether the matrix can be inverted. A determinant of zero means there is no inverse. The calculator finds it for 2×2, 3×3 and 4×4 grids.

When does a matrix have no inverse?

A matrix has no inverse when its determinant is zero, which means its rows or columns are not independent. The calculator reports this case rather than returning a wrong answer, and otherwise shows the exact inverse.

Does this work offline and is anything sent to a server?

The calculation runs entirely in your browser, so nothing you type is sent anywhere, and once the page has loaded it keeps working with no connection. There is no sign-up and no limit on how many calculations you make.