Gtech Aero Drag HP Loss Calculator

This form will calculate the HP that is lost due to aerodynamic drag at a given speed.

• In order to use this form, you need to know your vehicle's drag coefficient (Cd) and frontal area.
• You can find estimated drag coefficient and frontal area values for many vehicles here.
• We cannot reply to requests for values for your specific vehicle, please search the Internet or email your manufacturer. 

where:

Cd = drag Coefficient
A = frontal area in sq. ft.
V = Velocity (speed) in MPH

This calculator illustrates how the horsepower lost to aerodynamic drag goes up by 8 times for each time the speed doubles!

For example, input a speed of 20 MPH and look at the calculated HP loss, then change the speed to 40 MPH and re-calculate the HP loss -- it doesn't double, it goes up by a factor of 8!