Estimate Your Horsepower! (THIS IS JUST AN ESTIMATE BASED ON SIMPLE CALCULATIONS!)

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Vehicle weight in pounds (including driver) lbs

You are making : HP at the rear wheels and HP at the flywheel*.

*Note: Assuming a 20% drive train loss.

Tire diameter in inches

Enter the tire diameter in inches, rpm's of the motor at a certain speed as indicated by your speedometer in mph. This calculation assumes the car's transmission is in drive or 1:1 ratio, no overdrive.

Rear End Gear Ratio