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The calculator will convert wheel horsepower (WHP) to engine horsepower (EHP) and vice versa, based on the drivetrain loss percentage, and show detailed calculations.
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Our WHP to HP calculator helps you determine the engine horsepower equivalent to wheel horsepower (WHP). You can also perform reverse conversions from HP to WHP quickly and accurately.
HP refers to the actual power produced by a vehicle’s engine, while WHP (Wheel Horsepower) is the power delivered to the wheels when the vehicle is moving. The difference arises due to drivetrain losses.
HP = WHP / (1 – DL)
WHP = HP × (1 – DL)
Suppose a car has a wheel horsepower (WHP) of 240 and drivetrain loss of 15%. What is the engine horsepower (HP)?
HP = WHP / (1 – DL)
HP = 240 / (1 – 0.15)
HP = 240 / 0.85
HP ≈ 282.35
This means the engine produces approximately 282.35 HP to achieve 240 WHP at the wheels.
| Front Wheel Drive | 10% (0.10) |
| Rear Wheel Drive | 15% (0.15) |
| All Wheel Drive / 4WD | 25% (0.25) |
Our calculator converts between wheel horsepower (WHP) and engine horsepower (HP) accurately and easily. The interface is simple and intuitive:
From Wikipedia: WHP, Horsepower, Measurement, Engine power test standards.
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