Electrical Engineering Tools & Calculators

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Electrical Engineering Tools & Calculators

Ohm's Law Calculator

Calculate voltage, current, or resistance.

Voltage (V): Current (A): Resistance (Ω):

Power Factor Calculator

Calculate power factor from real and apparent power.

Real Power (W): Apparent Power (VA):

Transformer Calculator

Calculate transformer turns ratio and voltages.

Primary Turns: Secondary Turns: Primary Voltage (V):

Capacitor Charge Calculator

Calculate capacitor charge time.

Capacitance (F): Resistance (Ω): Voltage (V):

Inductive Reactance Calculator

Calculate reactance of an inductor.

Inductance (H): Frequency (Hz):

RC Time Constant Calculator

Calculate RC circuit time constant.

Resistance (Ω): Capacitance (F):

LED Resistor Calculator

Calculate resistor value for an LED.

Source Voltage (V): LED Voltage (V): LED Current (mA):

Battery Life Calculator

Estimate battery runtime.

Battery Capacity (mAh): Load Current (mA):

Voltage Divider Calculator

Calculate output voltage from divider.

Input Voltage (V): Resistor 1 (Ω): Resistor 2 (Ω):

dBm to Watts Converter

Convert between dBm and watts.

dBm: Watts:

Wire Gauge Calculator

Calculate wire gauge for current.

Current (A): Length (ft): Voltage Drop (%):

3-Phase Power Calculator

Calculate 3-phase power parameters.

Line Voltage (V): Line Current (A): Power Factor:

Engineer's Tools | Engineering Tools & Calculators