It's difficult to figure it out for cordless vacs, but easy for plug in ones. First you need to know the wattage, which you figure out using the voltage and the amperage. You multiply the volt by the amps. So the outlet you plug into is 110 volts, now say your vacuum is rated for 7 amps. That's 770 watts. 1 horsepower is 746 watts, so that would be 770 / 746 = 1.03 hp for a 7 amp vacuum.
340 Horsepower 340 Horsepower
1001 horsepower
160 horsepower
43 horsepower
170 horsepower
The 2009 Grizzly is available in several different horsepower configurations. The standard horsepower is 225. There were options for as much as 360 horsepower.
285 horsepower
325 horsepower.
555 horsepower
478 horsepower.
it has 240 horsepower
903 horsepower