Mathlean · Online math workspace
Complex number calculator
Calculate arithmetic with real and imaginary parts while retaining complex notation.
How to use this calculator
Edit the two factors. The starter multiplies (2+3i) by (1−4i), giving 14−5i.
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
The symbol i is the imaginary unit. Approximate results and multivalued powers require attention to precision and branches.
Mathlean combines visual mathematical input with computation and canvas tools. Results depend on the expression and available engine support; check important answers independently.