Mathlean · Online math workspace
QR decomposition calculator
Factor a supported matrix into orthogonal or unitary Q and upper-triangular R.
How to use this calculator
Edit the matrix in QRDecomposition. The diagonal starter has a simple orthogonal factor.
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
Interactive tools require JavaScript. You can read the guide and example without it.
What to know
Column signs and reduced versus full shapes can vary; compare reconstruction rather than a unique Q.
Mathlean combines visual mathematical input with computation and canvas tools. Results depend on the expression and available engine support; check important answers independently.