A complex number calculator is an essential tool for performing arithmetic operations—such as addition, subtraction, multiplication, and division—on complex numbers. These calculators also facilitate conversions between rectangular (a + bi) and polar (r∠θ) forms, aiding in the understanding of complex number properties. Advanced features may include calculating powers, roots, and evaluating trigonometric, hyperbolic, exponential, and logarithmic functions with complex arguments. Utilizing a complex number calculator simplifies complex mathematical expressions, making it invaluable for students, engineers, and professionals dealing with complex number computations.