Mathlean · Online math workspace

Matrix trace calculator

Add the main-diagonal entries of a square matrix.

How to use this calculator

Edit the diagonal example; its trace is 2+4=6.

Tap the math below to edit it and see the result. Once a result is ready, press Tab on a hardware keyboard to accept it. Outside a matrix, Return completes the line; the phone math keyboard has the same Return action.

Try it here

Trace⁡([2004])\operatorname{Trace}\left(\begin{bmatrix}2&0\\0&4\end{bmatrix}\right)

Interactive tools require JavaScript. You can read the guide and example without it.

What to know

Trace is different from determinant and does not sum every matrix entry.

Mathlean combines visual mathematical input with computation and canvas tools. Results depend on the expression and available engine support; check important answers independently.

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