Electrical Calculators

Calculate voltage, current, or resistance using Ohm's Law. Enter any two values to find the third instantly.

Calculate total resistance of resistors connected in series. Add up to 10 resistors and get the combined resistance instantly.

Calculate total resistance of resistors connected in parallel. Enter up to 4 resistor values.

Calculate electrical power from voltage, current, or resistance. Enter any two values to find power in watts.

Convert watts to amps for DC, AC single phase, and AC three phase circuits. Enter watts, volts, and power factor to get current in amps.

Convert amps to watts for DC, AC single phase, and AC three phase circuits. Enter current, voltage, and power factor to get power in watts.

Convert kVA to kW using power factor. Also calculates reactive power (kVAR). Essential for generator and UPS sizing.

Calculate power in watts from voltage and current for DC, AC single phase, and AC three phase circuits.

Calculate the cost of running an appliance based on wattage, hours of use, and electricity rate.

Calculate output voltage of a resistive voltage divider circuit. Enter input voltage and resistor values.

Calculate voltage drop across a wire based on wire gauge, length, and current. Ensure NEC compliance.

Convert amps (A) to milliamps (mA) instantly. Simple amp to milliamp conversion calculator.

Calculate how current splits between parallel resistors using the current divider formula.

Look up wire diameter, cross-sectional area, and resistance per foot for any AWG wire gauge size.

Decode resistor color bands to find resistance and tolerance. Supports 4-band and 5-band resistors with all standard color codes.

Calculate total capacitance for capacitors wired in series or parallel. Add up to 10 capacitors and get the combined capacitance instantly.