Technology
Resistive voltage divider
Find the unloaded output voltage of a two-resistor voltage divider.
Calculators / Technology / Series RLC impedance
Series RLC impedance calculator
Find impedance magnitude and signed reactance of an ideal series RLC circuit.
On this page
Impedance magnitude104.03Ω
Net reactance-28.69Ω
Calculator controls
How to calculate
Find impedance magnitude and signed reactance of an ideal series RLC circuit.
Impedance magnitude = sqrt(r^2+(2*pi*f*l/1000-1/(2*pi*f*c/1000000))^2) Ω; Net reactance = 2*pi*f*l/1000-1/(2*pi*f*c/1000000) Ω
Worked example
Resistance (Ω): 100; Inductance (mH): 10; Capacitance (µF): 100; Frequency (Hz): 50.
Impedance magnitude: 104.03 Ω; Net reactance: -28.69 Ω.
Assumptions and limits
Uses ideal components and the units shown. This calculation does not establish component ratings, wiring safety or regulatory compliance. Uses sinusoidal steady state; a positive reactance is inductive and a negative reactance is capacitive.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Find impedance magnitude and signed reactance of an ideal series RLC circuit.
When this tool is useful
Impedance magnitude = sqrt(r^2+(2*pi*f*l/1000-1/(2*pi*f*c/1000000))^2) Ω; Net reactance = 2*pi*f*l/1000-1/(2*pi*f*c/1000000) Ω
Understanding your inputs
| Input | What to enter |
|---|---|
| Resistance (Ω) | Enter a number of at least 0 and no more than 1000000000000. |
| Inductance (mH) | Enter a number of at least 0 and no more than 1000000000000. |
| Capacitance (µF) | Enter a number of at least 1e-12 and no more than 1000000000000. |
| Frequency (Hz) | Enter a number of at least 1e-12 and no more than 1000000000000. |
Frequently asked questions
What assumptions does this calculation use?
Uses ideal components and the units shown. This calculation does not establish component ratings, wiring safety or regulatory compliance. Uses sinusoidal steady state; a positive reactance is inductive and a negative reactance is capacitive.
How is the result calculated?
Impedance magnitude = sqrt(r^2+(2*pi*f*l/1000-1/(2*pi*f*c/1000000))^2) Ω; Net reactance = 2*pi*f*l/1000-1/(2*pi*f*c/1000000) Ω