RLC Resonance Frequency Calculator

Find the resonant frequency for Series or Parallel RLC circuits.

🔄 RLC Resonance Frequency Calculator – Series & Parallel Circuit Analysis Tool

The RLC Resonance Frequency Calculator is a free online tool for electrical and electronics engineering students to calculate the resonant frequency (fr) of RLC circuits — both series and parallel. It helps you determine the frequency at which inductive reactance equals capacitive reactance, making the circuit purely resistive.

📘 What is Resonance Frequency?

In an RLC circuit, resonance occurs when the inductive reactance (XL) and capacitive reactance (XC) cancel each other out. At this point, the impedance is minimum in a series circuit or maximum in a parallel circuit, and the circuit operates at its natural frequency.

⚙️ Resonance Frequency Formula:

fr = 1 / (2 × π × √(L × C))

Where:
fr = Resonant Frequency (Hz)
L = Inductance (H)
C = Capacitance (F)

🧮 How to Use the Calculator:

  1. Enter the inductance (L) value in Henrys (H).
  2. Enter the capacitance (C) value in Farads (F).
  3. Click the Calculate button to find the resonance frequency in Hertz (Hz).

💡 Example:

If L = 10 mH and C = 0.1 µF, then: fr = 1 / (2 × π × √(10×10⁻³ × 0.1×10⁻⁶)) ≈ 15.9 kHz

📗 Features:

  • Instant calculation of resonance frequency for RLC circuits
  • Supports series and parallel RLC circuit analysis
  • Auto unit conversion for microfarads and millihenrys
  • Ideal for B.Tech, Diploma, and EEE students
  • Mobile-friendly and accurate design

🎯 Applications:

  • Designing tuned amplifiers and radio circuits
  • Analyzing bandwidth and quality factor (Q) of circuits
  • Determining resonance frequency in AC networks
  • Used in lab experiments for RLC circuit study

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📚 Related Tools:

This RLC Resonance Frequency Calculator helps you understand how frequency affects circuit behavior — essential for AC analysis, lab experiments, and circuit design.