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Both calculators run independently — change the inputs on either side to compare results.

Motor Full Load Current Calculator

Calculate the full load current (FLA) drawn by a single-phase or three-phase AC motor from its horsepower, voltage, efficiency, and power factor. Used for selecting fuses, breakers, wire gauges, and motor starters.

Motor Horsepower (HP)

Motor Voltage

Motor Efficiency (%)

Power Factor

Number of Phases

Fill in the required fields to see your result.

Electrical

Short Circuit Current Calculator

Compute the available short-circuit current (ASCC) at a fault point downstream of a transformer, accounting for transformer impedance and cable impedance to the fault location. Use this to verify that breakers and fuses have a sufficient interrupting rating.

Transformer Size (kVA)

Transformer Impedance (%)

System Voltage

Cable Length to Fault (ft)

Cable Size (AWG/kcmil)

Fill in the required fields to see your result.

Key differences

	Motor Full Load Current Calculator	Short Circuit Current Calculator
Category	Electrical	Electrical
Inputs required	5	5
Result	Full Load Current (A)	Short Circuit Current (A)
What it does	Calculate the full load current (FLA) drawn by a single-phase or three-phase AC motor from its horsepower, voltage, efficiency, and power factor. Used for selecting fuses, breakers, wire gauges, and motor starters.	Compute the available short-circuit current (ASCC) at a fault point downstream of a transformer, accounting for transformer impedance and cable impedance to the fault location. Use this to verify that breakers and fuses have a sufficient interrupting rating.