In the world of automotive performance, understanding the difference between Brake Horsepower (BHP) and Horsepower (HP) is crucial. The BHP to HP Calculator simplifies this process, providing a straightforward method for converting the brake horsepower of an engine, which is the raw power output measured at the crankshaft, to the horsepower, which is the actual power delivered to the wheels or output shaft. This distinction matters to enthusiasts, mechanics, and engineers alike, as it offers a clearer picture of a vehicle’s performance by accounting for power losses through the drivetrain.
Formula of BHP to HP Calculator
HP = BHP * 0.85
Where:
- HP is the horsepower deliver to the wheels or output shaft.
- BHP is the brake horsepower produced by the engine at the crankshaft.
This formula assumes an average drivetrain loss of 15%, which is a common approximation used in the automotive industry. However, it’s important to note that actual losses can vary based on the type of drivetrain, vehicle model, and other factors.
General Conversion Table
For convenience and to save time, a table of common conversions from BHP to HP using the formula provided above can greatly assist users. This table allows for quick reference without the need for manual calculations.
| BHP | HP |
|---|---|
| 100 | 85 |
| 200 | 170 |
| 300 | 255 |
| 400 | 340 |
| 500 | 425 |
| 600 | 510 |
| 700 | 595 |
| 800 | 680 |
| 900 | 765 |
| 1000 | 850 |
This table covers a wide range of engine outputs, from economical cars to high-performance sports cars, ensuring a broad applicability.
Example of BHP to HP Calculator
Consider a sports car with an engine that produces 300 BHP. To find out how much horsepower is actually making it to the wheels, we use the formula:
HP = 300 * 0.85 = 255 HP
This means that, after accounting for drivetrain losses, the car delivers 255 HP to the wheels, a critical figure for understanding its real-world performance.
Most Common FAQs
BHP, or Brake Horsepower, is the total power output of an engine measure at the crankshaft without any losses. In contrast, HP, or Horsepower, refers to the actual power that reaches the wheels or output shaft after accounting for drivetrain losses.
The conversion factor from BHP to HP assumes an average drivetrain loss of 15%. However, the actual loss can vary due to factors like the type of drivetrain (e.g., front-wheel drive, rear-wheel drive, all-wheel drive), the efficiency of the transmission, and the vehicle’s overall mechanical condition.
To accurately measure your vehicle’s HP, you should conduct a dyno test. A dyno test measures the vehicle’s output directly at the wheels, giving you a precise reading of its horsepower. This method bypasses the need for conversion and accounts for all drivetrain losses directly.