AC Impedance and Reactance Calculator
Calculate inductive and capacitive reactance, net series impedance magnitude, and phase angle for an ideal RLC circuit.
Enter component values
Series impedance
About this calculator
Calculate inductive and capacitive reactance, net series impedance magnitude, and phase angle for an ideal RLC circuit.
Use measured or specified component values and frequency for the circuit being evaluated.
Method and assumptions
Inductive reactance XL = 2πfL. Capacitive reactance XC = 1 ÷ (2πfC). For a series circuit, net reactance X = XL − XC, impedance magnitude |Z| = √(R² + X²), and phase angle = arctan(X ÷ R).
The calculator treats the components as linear, ideal lumped elements at one sinusoidal frequency. It does not model parasitics, magnetic saturation, heating, harmonics, or installation-level resonance.
FAQs
Does this model include real component behavior?
No. It uses ideal lumped-component equations and an entered series resistance. Real components have tolerances, parasitic effects, losses, and frequency-dependent ratings.
Can I use this to analyze facility harmonics or filter design?
No. These single-frequency calculations are not a harmonic study, filter design approval, or resonance assessment for an electrical installation.
Sources
Ideal inductor, capacitor, and series impedance relationships.