Electrical Circuits & Components

Professional online circuit calculators for electrical engineers. Easily calculate capacitance, inductance, filter resonance, and Ohm’s Law parameters. From capacitor energy to discharge timing, access precise tools to validate your component selections and circuit designs.

3D engineering diagram of a copper coil inductor with magnetic field visualization and measurement labels

Inductor Calculator kits

Calculate air core coil inductance using Wheeler’s formula. Input coil diameter, length, and turns to get instant results for your RF and antenna design projects.

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3D illustration of accumulated electric charges on capacitor plates with Coulomb measurement units

Capacitance Charge Calculator

Easily calculate between charge (Q), capacitance (C), and voltage (V) with our interactive tool. Learn core capacitor concepts and visualize the Q=CV relationship.

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3D visualization of a high-pass filter frequency response curve illustrating low-frequency attenuation and high-frequency transmission

High Pass Filter Calculator

Calculate the cutoff frequency for an RC high-pass filter with our interactive tool. Includes a Bode plot, circuit diagram, and core HPF formulas for RF design.

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3D visualization of a low-pass filter frequency response curve showing high-frequency attenuation and signal smoothing

Low Pass Filter Calculator

Calculate the cutoff frequency for RC and RL low-pass filters. Features an interactive calculator, circuit diagrams, Bode plots, and core filter theory.

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3D visualization of the RC time constant showing an exponential charging curve and the 63.2 percent mark

Time Constant Calculator

Calculate RC and RL circuit time constants (τ) and 5τ values. Visualize charging and discharging curves with our interactive chart for electronics design.

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3D circuit visualization of total current splitting into parallel resistor branches according to current divider rule

Current Divider Calculator

Calculate how current splits between parallel resistors with our Current Divider Calculator. Get instant results, circuit diagrams, and real-time charts.

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3D visualization of color-coded axial resistors and SMD components for resistance value calculation

Resistor Calculator

Calculate total equivalent resistance for series and parallel circuits. Features interactive diagrams, step-by-step formulas, and worked electronics examples.

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3D visual of various capacitor types including electrolytic and ceramic with digital capacitance value readouts

Capacitor Calculator

Use our All-in-One Capacitor Calculator to decode codes, calculate series/parallel values, RC time constants, and capacitive reactance with ease.

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