Inductor Calculator

Introduction

The Inductor Calculator computes inductance, energy stored, or reactance in an inductor — a key component in circuits involving alternating current, filters, and transformers.

How to Use

1. Enter Current (I) or Frequency, depending on the calculation type

2. Enter Inductance (L) in Henries, or relevant coil parameters

3. Click "Calculate XL" — the result (energy stored or reactance) will display

Formula Explanation

Energy Stored: E = ½ × L × I²

Inductive Reactance: XL = 2π × f × L

Where f = frequency and L = inductance.

Practical Context

Inductor calculations are important in designing AC circuits, power supply filters, and radio frequency applications. Inductors resist changes in current flow and store energy in a magnetic field, making them essential components in transformers, motors, and signal filtering circuits used across electronics and electrical engineering.

FAQs

Q1: What does an inductor do differently from a resistor or capacitor?

While resistors oppose current flow and capacitors store energy in an electric field, inductors oppose changes in current and store energy in a magnetic field — this unique property makes them essential for filtering and energy storage in AC circuits.

Q2: What is inductive reactance?

Inductive reactance is the opposition an inductor presents to alternating current, which increases with both frequency and inductance value — unlike simple resistance, it depends on how fast the current is changing.

Q3: Why are inductors used in power supply filters?

Inductors resist rapid changes in current, making them effective at smoothing out ripples and spikes in DC power supplies when combined with capacitors, resulting in a more stable output voltage.