Electricity Calculator Group

Electronic Components Calculators

Calculate capacitor, inductor, LED, transistor, diode, relay, and snubber values.

Choose the electrical result you need

Use component tolerances, voltage ratings, current limits, frequency behavior, and thermal data from the selected parts.

Open the calculator whose primary output matches the decision at hand. Each worksheet shows its formula, loaded example, input definitions, limitations, and related calculations.

Electronic Components worksheets

Capacitor ChargingCalculate capacitor voltage for a defined electrical case.Capacitor DischargingCalculate remaining voltage for a defined electrical case.RC Time ConstantCalculate rC time constant for a defined electrical case.Series CapacitorCalculate equivalent capacitance for a defined electrical case.Parallel CapacitorCalculate equivalent capacitance for a defined electrical case.Capacitor EnergyCalculate stored energy for a defined electrical case.Series InductorCalculate equivalent inductance for a defined electrical case.Parallel InductorCalculate equivalent inductance for a defined electrical case.Inductor EnergyCalculate stored magnetic energy for a defined electrical case.RL Time ConstantCalculate rL time constant for a defined electrical case.LED ResistorCalculate series resistance for a defined electrical case.LED Series StringCalculate lEDs per string for a defined electrical case.Transistor Base ResistorCalculate base resistor for a defined electrical case.BJT BiasCalculate base current for a defined electrical case.MOSFET Conduction LossCalculate conduction loss for a defined electrical case.MOSFET Switching LossCalculate switching loss for a defined electrical case.Diode Power DissipationCalculate diode loss for a defined electrical case.Zener ResistorCalculate series resistor for a defined electrical case.Relay Coil CurrentCalculate coil current for a defined electrical case.RC SnubberCalculate snubber time constant for a defined electrical case.

Use ratings and measurements deliberately

Keep voltage type, current path, frequency, phase arrangement, operating time, and temperature with the result. A value taken from a nameplate may describe a different condition from a meter reading.

These calculators support arithmetic and comparison. They do not replace electrical codes, equipment instructions, qualified design, safe isolation, or test procedures.