Electrical & Electronics Calculators
Circuits, components, transformers, batteries and electronics calculators
Voltage Divider Calculator
Calculate output voltage for a two-resistor voltage divider.
Calculate now →LED Series Resistor Calculator
Calculate a series resistor for an LED from supply voltage, forward voltage and current.
Calculate now →Resistor Power Dissipation Calculator
Calculate resistor power from current and resistance.
Calculate now →Capacitor Charge Calculator
Calculate electrical charge stored in a capacitor.
Calculate now →Capacitor Energy Calculator
Calculate energy stored in a capacitor.
Calculate now →RC Time Constant Calculator
Calculate the RC time constant and approximate five-time-constant settling time.
Calculate now →RL Time Constant Calculator
Calculate the RL circuit time constant from inductance and resistance.
Calculate now →LC Resonant Frequency Calculator
Calculate ideal resonant frequency from inductance and capacitance.
Calculate now →Capacitive Reactance Calculator
Calculate capacitor reactance at a selected frequency.
Calculate now →Inductive Reactance Calculator
Calculate inductor reactance at a selected frequency.
Calculate now →Series RLC Impedance Calculator
Calculate impedance magnitude for an ideal series RLC circuit.
Calculate now →Single-Phase Apparent Power Calculator
Calculate apparent power from RMS voltage and current.
Calculate now →Reactive Power Calculator
Estimate reactive power from voltage, current and power factor.
Calculate now →Transformer Turns Ratio Calculator
Calculate the ideal transformer secondary-to-primary turns ratio.
Calculate now →Transformer Secondary Voltage Calculator
Estimate ideal secondary voltage from primary voltage and winding turns.
Calculate now →Transformer Secondary Current Calculator
Estimate ideal secondary current from primary current and turns.
Calculate now →Battery Series Voltage Calculator
Calculate total nominal voltage for identical cells or batteries connected in series.
Calculate now →Battery Parallel Capacity Calculator
Calculate total amp-hour capacity for identical batteries connected in parallel.
Calculate now →Amp-Hours to Watt-Hours Calculator
Convert battery amp-hours to watt-hours at a specified voltage.
Calculate now →Watt-Hours to Amp-Hours Calculator
Convert watt-hours to amp-hours at a specified voltage.
Calculate now →DC Wire Voltage Drop Calculator
Estimate DC voltage drop using current, one-way wire length and conductor resistance.
Calculate now →Wire Power Loss Calculator
Calculate resistive wire loss from current and total circuit resistance.
Calculate now →PWM Duty Cycle Calculator
Calculate PWM duty cycle from on-time and total period.
Calculate now →PWM Average Voltage Calculator
Estimate average ideal PWM voltage from supply voltage and duty cycle.
Calculate now →Frequency to Period Calculator
Convert frequency to period in seconds and milliseconds.
Calculate now →