Add/subtract/multiply/divide complex numbers.. Complex Number Calculator is a free online tool from the ToolsRift Math Calculators collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.
Enter the real and imaginary parts of two complex numbers, choose an operation, and the result is shown in a+bi form.
In the form a + bi, where a is the real part, b the imaginary part, and i is √(−1).
(a+bi)(c+di) = (ac−bd) + (ad+bc)i, using the rule that i² = −1.
Multiply the numerator and denominator by the conjugate of the denominator to remove i from the bottom.