Engineering Calculators
Horsepower Calculator
Calculate HP from torque and RPM; convert between HP, kW, PS.
What is the Horsepower Calculator & How does it work?
Horsepower (HP) is a unit of power commonly used to measure the output of engines. It can be calculated using the formula HP = Torque (Nm) × RPM / 5252, where RPM stands for revolutions per minute.
This calculator also facilitates conversions between different units of power, including kilowatts (kW) and metric horsepower (PS). Understanding these relationships is crucial for engineers and mechanics to optimize engine performance and efficiency. For instance, 1 HP is equivalent to approximately 0.7457 kW or 0.981 PS.
HP = frac{Torque (Nm) × RPM}{5252}
HP = Horsepower, Torque = Torque in Newton-meters, RPM = Revolutions per minute
Parameters
Nm
RPM
Factor
Factor
Factor
Factor
Mechanical HP—
kW from HP—
HP from kW—
PS from HP—
HP from PS—
Frequently Asked Questions
How do I calculate horsepower from torque and RPM?
Use the formula: HP = Torque (Nm) × RPM / 5252.
What is the relationship between horsepower and kilowatts?
1 HP is approximately equal to 0.746 kW.
How do I convert metric horsepower (PS) to regular horsepower?
1 PS is equivalent to about 0.986355 HP.
Can this calculator help me optimize engine performance?
Yes, by calculating and converting power units, you can better understand and optimize engine efficiency.
What is the significance of 5252 in the horsepower formula?
The constant 5252 is used to convert torque from Newton-meters to pound-feet and RPM to radians per second, standardizing the calculation.
Results are for informational purposes only and do not constitute professional advice.