Horsepower Calculator
Calculate engine horsepower from torque and RPM
Calculator
Enter torque and RPM to compute mechanical horsepower.
About the Horsepower Calculator
The Horsepower Calculator allows you to quickly determine engine power output from torque and RPM. Using the standard mechanical horsepower formula, this tool is ideal for automotive tuning, engine diagnostics, mechanical engineering, and performance estimation. Whether you're working on a car, motorcycle, small engine, or industrial machine, this calculator provides fast and accurate horsepower values.
What You Can Calculate
- Horsepower (HP): Mechanical power output of the engine based on torque and rotational speed.
- Torque (ft·lb or N·m): The rotational force produced by the engine.
- RPM: Engine speed measured in revolutions per minute.
- Unit Conversions: Convert torque between ft·lb and newton-meters instantly.
Formulas Used in the Calculator
The following standard equations are used in automotive and mechanical engineering:
- Main Horsepower Formula: HP = (Torque × RPM) / 5252
- Metric Conversion: 1 N·m = 0.737562 ft·lb
- Definition: 1 HP = 550 ft·lb per second (historical mechanical definition)
How to Use the Calculator
- Enter the torque value and select the correct unit (ft·lb or N·m).
- Enter the engine RPM.
- The calculator instantly computes mechanical horsepower (HP).
Applications of Horsepower Calculation
Horsepower calculations are essential in automotive engineering, dyno testing, engine tuning, and machinery performance analysis. By understanding the relationship between torque and RPM, engineers and enthusiasts can evaluate engine efficiency, compare performance, select motors, and diagnose power loss. This calculator simplifies the process by providing clear, accurate horsepower values in real time.