Generic motor estimate

Motor Output, Input Power & Current Calculator

Estimate electrical input power, apparent power and current from motor shaft output, efficiency, power factor, voltage and phase.

Enter your values

Example values demonstrate the method; they are not product recommendations.

Your result

Enter measured or nameplate values to calculate.

Method

Mechanical output is converted to kW, divided by efficiency for electrical input, then divided by power factor for kVA and converted to current.

Important limits

Nameplate or measured values are better than defaults. Starting current, harmonics, duty, temperature and protection are outside this estimate.

Technical reference