Formula variables
- Horsepower is the motor output rating entered by the user.
- 0.7457 is the kW per horsepower conversion factor.
- Mechanical kW is output power, not electrical input kW.
- Electrical current requires voltage, efficiency, and power factor.
Assumptions
- The conversion uses 1 horsepower = 0.7457 kW.
- The result is mechanical output power, not electrical input demand.
- Motor nameplate current, voltage, efficiency, and power factor govern electrical review.
- This calculator does not estimate electrical input current, conductor size, starter size, overload setting, or protection requirements.
Examples
10 hp motor. A 10 hp motor converts to 7.457 mechanical kW, usually rounded to 7.5 kW for schedule review.
Current workflow. Use this conversion before estimating motor full-load current with efficiency, power factor, voltage, and phase.