Horsepower Calculator
Calculate engine power in horsepower (HP) from torque and RPM, or convert between different power units (HP, kW, PS). This calculator helps automotive enthusiasts and professionals determine engine performance.
Result
Horsepower (HP): -
Kilowatt (kW): -
Pferdestärke (PS): -
About the Horsepower Calculator
The horsepower calculator helps you determine engine power in different units (HP, kW, PS) and calculates horsepower from torque and RPM. This is essential for automotive enthusiasts, engineers, and mechanics to evaluate engine performance.
How to Use the Horsepower Calculator
Select the appropriate tab for your calculation:
- Torque & RPM: Enter the torque (in lb-ft) and RPM values to calculate horsepower and other power units.
- Unit Conversion: Convert between horsepower (HP), kilowatts (kW), and Pferdestärke (PS) power units.
Key Features:
- Calculate horsepower from torque and RPM
- Convert between HP, kW, and PS power units
- Visual chart showing power comparisons
- Accurate calculations using standard formulas
- Responsive design works on all devices
Horsepower Calculation Formula
The calculator uses the standard formula to calculate horsepower from torque and RPM:
HP = (Torque × RPM) / 5252
Where:
- HP is the horsepower
- Torque is in pound-feet (lb-ft)
- RPM is the engine speed in revolutions per minute
- 5252 is a constant that comes from the conversion factors
Power Unit Conversion Factors
The calculator uses these conversion factors between power units:
- 1 HP = 0.7457 kW
- 1 HP = 1.01387 PS
- 1 kW = 1.34102 HP
- 1 kW = 1.35962 PS
- 1 PS = 0.98632 HP
- 1 PS = 0.7355 kW
Common Uses
This calculator is useful for:
- Evaluating engine performance
- Comparing different engines
- Converting power units for specifications
- Automotive tuning and modifications
- Engineering calculations