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Capacitive Reactance Calculator

This calculator allows you to quickly determine capacitive reactance. Capacitive reactance depends on the frequency of the applied voltage and the capacitance:

X_C = 1 / 2πfC

This equation is valid only for calculating the capacitive reactance of a capacitor to sinusoidal alternating current.

Capacitive reactance is measured in Ohms like resistance.

Frequently Asked Questions

How to calculate capacitive reactance (Xc) – simple examples of application

How to calculate capacitive reactance (Xc) – simple examples of application
Student Project: RC Circuit in Lab Data: C = 0.1 µF = 1.0×10^–7 F, f = 1 kHz = 1000 Hz Calculation: X_C = 1 / 2×π×1000×1.0×10^–7 ≈ 1591 Ω Result / Interpretation: the capacitor provides about 1.6 kΩ reactance at 1 kHz. Helps to choose resistor values and predict circuit behavior. Professional Use: Audio Filter Data: C = 0.47 µF = 4.7×10^–7 F, f = 20 kHz = 20000 Hz Calculation: X_C = 1 / 2×π×20000×4.7×10^–7 ≈ 17 Ω Result / Interpretation: at high frequencies, the capacitor "passes" the signal (low reactance). Useful in audio crossover filters and coupling circuits. Home / DIY: Power Supply Smoothing Data: C = 10 µF = 1.0×10^–5 F, f = 50 Hz Calculation: X_C = 1 / 2×π×50×1.0×10^–5 ≈ 318 Ω Result / Interpretation: in AC ripple filtering, reactance shows how effectively a capacitor smooths voltage after rectification. Up