Motor HP to RPM Calculator
Calculate motor rotational speed from horsepower and torque
Motor HP to RPM Calculator
Based on standard mechanical power formulas
Results:
Revolutions Per Minute (RPM): 0.00
How to Use the Calculator
Input Horsepower
- Enter the motor's horsepower (HP) rating.
- This is the mechanical output power.
- Ensure units are in HP.
Input Torque
- Enter the motor's torque in pound-feet (lb-ft).
- This is the rotational force produced.
- Ensure units are in lb-ft.
Calculate RPM
- Click the "Calculate" button.
- The calculator will display the motor's RPM.
- Use the "Reset" button to clear inputs.
Motor HP to RPM Fundamentals
Horsepower (HP)
Horsepower is a unit of power, representing the rate at which work is done. In motors, it's the mechanical output power.
Torque (lb-ft)
- Torque is the rotational equivalent of linear force.
- It measures the twisting force that causes rotation.
- Commonly expressed in pound-feet (lb-ft) or Newton-meters (Nm).
Relationship:
RPM, HP, and Torque are fundamentally linked in rotational mechanical systems. Knowing any two allows you to determine the third.
Calculation Formulas
RPM from HP and Torque:
RPM = (HP × 5252) / Torque (lb-ft)
Where 5252 is a constant used when HP is in horsepower and Torque is in lb-ft.
Example Calculation
Motor with 5 HP and 10 lb-ft Torque:
Horsepower (HP): 5
Torque (lb-ft): 10
RPM = (5 × 5252) / 10
RPM = 26260 / 10
RPM = 2626
Result: 2626 RPM