Engine Motor Horsepower Estimate From Trap Speed Calculator

Quarter Mile Run Or Drag Race

Automobile Car Truck Motorcycle

Trap Speed to HP Elapsed Time to HP Tire Size Calculator Paycheck Calculator


Do you have a high performance car, motorcycle, truck or vehicle, built a new engine, performed a tune up or installed a performance part? Try out this calculator get a rough estimate of horsepower.

This calculator computes the estimated engine or motor horsepower from trap speed. Trap speed is the velocity or speed of a vehicle at the end of a run or race competition. This web app uses the quarter mile distance or track.

Note: This is a rough and quick estimate of engine horsepower. It should be used for recreational use only. To get more accurate measurement of power rating, the engine should be placed under load using a dynamometer or dyno. This will give peak horsepower and torque.

Note: The equation or formula for the calculation uses standard or US units. When using SI units, the units are converted to standard units before the solution is computed.

Note: This application uses HTML5. It should work on all devices (smart phone, tablet, desktop, laptop, hybrids) and operating systems. If any bugs or issues are found, email the author using the address below.

Calculation Instructions:

  1. Enter vehicle weight - This can be done by entering value or using the up and down arrows to step the number field
  2. Enter speed or velocity - This is how fast the automobile is going at end of the 1/4 mile run or trap
  3. Inspect/analyze calculations and results in parameters, charts and graphs.


Unit Unit Type Unit Used Description
vehicle weight mass pound US (lb) or kilogram (kg) The weight of the car, truck or automobile including the driver, passenger and accessories.
speed or velocity velocity mile/hour (mph) or kilometer/hour (km/h) The velocity or speed of a vehicle measured in the trap at the end of a quarter mile run.


Unit Unit Type Unit Used Description
horsepower power horsepower (hp) The horsepower the electric, diesel or gasoline engine is capable of producing.
Chart or Graph Not applicable Not applicable Shows an Engine Horsepower versus Speed plot.

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