Buddy's Simple Horsepower Calculator (with variants)...

NOTE! This is just an estimate, and is probably not all that accurate.

This program will give you a ballpark estimate of your horsepower. Please don't make the mistake of quoting these numbers as if they meant anything.

There are two simple horsepower formulas that can estimate the on-the-pavement horsepower for a given car.

This method uses the weight of the car and the time it took that car to travel 1330 feet (¼ mile).

The formula is: hp = weight / (ET / 5.825)³

This method uses the weight of the car and the speed at which the car completed the quarter-mile run.

The formula is: hp = weight * (speed / 234)³

Fill in the data that you know.

1. Calculate the horsepower...

How much does your car weigh (with you in it, of course)?	lbs
What was your 1/4-mile Elapsed Time (ET)?	seconds
What was your 1/4-mile Trap Speed (MPH)?	mph

		HP at rear wheels based on ET...
		HP at rear wheels based on MPH...
		HP at rear wheels based on average of ET & MPH...
		Approx Engine HP (Aver. rear wheel HP * 1.125)...

2. Calculate MPH/ET...

Using the HP value from above (or whatever HP you want to use)...	HP
...what weight would you like to use for additional calculations?	lbs

		Anticipated speed (MPH) based on the specified HP-vs-Weight, above...
		Anticipated ET based on the specified HP-vs-Weight, above...