Electrical & Electronics Calculators

Ohm's Law Calculator. Ohm’s law and resistor-network calculations for common electronics work. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Watts to Amps Calculator. Calculate current, voltage and power from electrical operating values. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Amps to Watts Calculator. Calculate current, voltage and power from electrical operating values. Calculations run in your browser. Entered electrical values are not uploaded to our server.

kW to Amps Calculator. Calculate current, voltage and power from electrical operating values. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Voltage Drop Calculator. Mathematical resistive voltage-drop estimates without code-compliance claims. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Three-Phase Power Calculator. Single-phase, balanced three-phase, apparent power and power-factor calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Resistor Color Code Calculator. Resistor color codes and LED series-resistor calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

LED Resistor Calculator. Resistor color codes and LED series-resistor calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Battery Runtime Calculator. Battery energy, capacity and simple runtime estimates with explicit usable-capacity assumptions. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Watts to Amps Calculator. Calculate current, voltage and power from electrical operating values. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Amps to Watts Calculator. Calculate current, voltage and power from electrical operating values. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Volts to Amps Calculator. Calculate current, voltage and power from electrical operating values. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Amps to Volts Calculator. Calculate current, voltage and power from electrical operating values. Calculations run in your browser. Entered electrical values are not uploaded to our server.

kW to Amps Calculator. Calculate current, voltage and power from electrical operating values. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Ohm's Law Calculator. Ohm’s law and resistor-network calculations for common electronics work. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Single-Phase Power Calculator. Single-phase, balanced three-phase, apparent power and power-factor calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Three-Phase Power Calculator. Single-phase, balanced three-phase, apparent power and power-factor calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Power Factor Calculator. Single-phase, balanced three-phase, apparent power and power-factor calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

kW to kVA Calculator. Single-phase, balanced three-phase, apparent power and power-factor calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

kVA to kW Calculator. Single-phase, balanced three-phase, apparent power and power-factor calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Series Resistor Calculator. Ohm’s law and resistor-network calculations for common electronics work. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Parallel Resistor Calculator. Ohm’s law and resistor-network calculations for common electronics work. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Resistor Color Code Calculator. Resistor color codes and LED series-resistor calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

LED Resistor Calculator. Resistor color codes and LED series-resistor calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Voltage Drop Calculator. Mathematical resistive voltage-drop estimates without code-compliance claims. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Capacitors in Series Calculator. Series/parallel capacitance, RC time constant and AC reactance calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Capacitors in Parallel Calculator. Series/parallel capacitance, RC time constant and AC reactance calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

RC Time Constant Calculator. Series/parallel capacitance, RC time constant and AC reactance calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Battery Runtime Calculator. Battery energy, capacity and simple runtime estimates with explicit usable-capacity assumptions. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Battery Capacity Calculator. Battery energy, capacity and simple runtime estimates with explicit usable-capacity assumptions. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Wh to Ah Calculator. Battery energy, capacity and simple runtime estimates with explicit usable-capacity assumptions. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Ah to Wh Calculator. Battery energy, capacity and simple runtime estimates with explicit usable-capacity assumptions. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Capacitive Reactance Calculator. Series/parallel capacitance, RC time constant and AC reactance calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Inductive Reactance Calculator. Series/parallel capacitance, RC time constant and AC reactance calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.