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The impedance of an air wound coil is given by the following formula:

Xl = 2 * pi * f * L

Where Xl is the inductive reactance in ohms, f is the frequency in hertz and L the inductance of the coil in Henrys.
An inductor wound on an iron or ferrite core will have a different value.

Calculate inductive reactance

 Frequency in Hz: Hz kHz MHz Inductivity in Henry H mH nH Inductive Reactance Ohms Inductive Reactance kOhms Inductive Reactance MOhms

Calculate required Inductor for producing a inductive reactance

 Frequency: Hz kHz MHz Inductive reactance Ohms kOhms MOhms Value of Inductor = H Value of Inductor = mH Value of Inductor = nH

Calculate Impedance of a Parallel RL Circuit

 Frequency: Hz kHz MHz Inductor: H mH nH Resistant: Ohms kOhms MOhms inductive reactance Xl = Ohms Total impedance Z = Ohms

Calculate Impedance of a Series RL Circuit

 Frequency: Hz kHz MHz Inductor: H mH nH Resistant: Ohms kOhms MOhms inductive reactance Xl = Ohms Total impedance Z = Ohms

Calculate Q of an Inductor

 Frequency: Hz kHz MHz Internal resistance of the inductor Ohms kOhms MOhms Inductor H mH Q of inductor =

Xc = 1 / (2 * pi * f * C)

This is similar to the inductor, with C in farads and f in hertz. The capacitive reactance will be in ohms.

Calculate capacitive reactance

 Frequency in Hz: Hz  kHz  MHz Capacity F  uF  nF  pF Capacitive Reactance Ohms Capacitive Reactance kOhms Capacitive Reactance MOhms

Calculate required Capacitor for producing a capacitive reactance

 Frequency: Hz kHz MHz Capacitive reactance Ohms kOhms MOhms Value of capacitance = uF

Calculate total impedance of a Parallel RC circuit

 Frequency: Hz kHz MHz Capacity: F uF nF pF Resistant: Ohms kOhms MOhms capacitive reactance Xc = Ohms Total impedance Z = Ohms

Calculate total impedance of a Series RC circuit

 Frequency: Hz kHz MHz Capacity: F uF nF pF Resistant: Ohms kOhms MOhms capacitive reactance Xc = Ohms Total impedance Z = Ohms

Calculate required inductance & capacitance
 Desired frequency: Hz Hz  kHz  MHz Desired reactance: Ohms Required inductance, L = H Required inductance, L = mH Required inductance, L = nH Required capacitance, C = µf Required capacitance, C = nf Required capacitance, C = pf

Calculate the resonant frequency of a capacitor and inductor

 Inductor : H  mH  nH Capacitor: F  uF  nF  pF Fres Hz Fres kHz Fres MHz