Calculating Complex Numbers

Complex Number Calculator

You can enter complex numbers in standard form, a + bi, or use the cis function to enter complex numbers in polar form, rcis(θ) which stands for r(cos(θ) + i sin(θ)) which is equal to reiθ.

If the result of a calculation is a complex number, it is automatically displayed in standard form and cis form (and its equivalent exponential form).

Warning: In Degree mode, you may get unexpected erroneous results if the argument of the non-algebraic functions you use in your expressions is not a purely real or purely imaginary number. Use Degrees with discretion when calculating complex number.