Reactance Calculators

Reactance Calculators are tools that help calculate the reactance of capacitors and inductors in AC (alternating current) circuits. Reactance is the opposition that these components provide to the flow of AC, and unlike resistance, it depends on the frequency of the signal.

Here's a quick breakdown of the different types of reactance calculators:

Calculate Capacitance and Inductance from Reactance:

Purpose: Find the value of a capacitor or inductor when you know its reactance and the frequency of the AC signal.
Formulas:
Capacitance (C):


Inductance (L):
​

Where:
XC = Capacitive reactance (ohms)
XL = Inductive reactance (ohms)
f = Frequency (Hz)
Calculate Inductive Reactance:
Purpose: Determine how much an inductor resists changes in current flow in an AC circuit.
Formula:

Where:
XL = Inductive reactance (ohms)
f = Frequency (Hz)
L = Inductance (henries, H)

Calculate Capacitive Reactance:

Purpose: Measure how much a capacitor resists the flow of AC current.
Formula:


Where:
XC = Capacitive reactance (ohms)
f = Frequency (Hz)
C = Capacitance (farads, F)

Why use Reactance Calculators?
Circuit design: Helps choose the right capacitor or inductor for AC circuits.
Frequency response: Understand how capacitors and inductors behave at different frequencies.
Impedance matching: Ensure proper power transfer in RF and audio systems.
Filter design: Create low-pass, high-pass, or band-pass filters.