प्लाईवुड ज्ञान · तकनीक · विशेषज्ञताMotor output in kW and HP from electrical readings (single or three phase) or from torque and speed.
Motor HP Calculator
Result
Step-by-step calculation
Formula
Three phase: kW input = √3 × V × I × PF ÷ 1000
Single phase: kW input = V × I × PF ÷ 1000
Shaft kW = kW input × Efficiency; Torque: kW = T (N·m) × rpm ÷ 9550; HP = kW ÷ 0.746Worked example
Calculated with the default values shown in the form.
Technical notes
- Select a standard motor rating above the calculated load; 10 to 25% margin is common.
- Use measured running current for existing machines.
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