Power in  Values 
Watts  x 
mechanical horsepowers  x 
metric horsepowers  x 
electrical horsepowers  x 
boiler horsepowers  x 
BTU/h  x 
Force: 

Distance: 

Time: 
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Many of us must have seen advertisements of cars and other commercial vehicles where horse keep running ahead, behind or along with the vehicle being advertised. To put it precisely, the advertiser is comparing his vehicle with that of a horse and is proud of the horsepower of the vehicle.
The horsepower (hp) of an engine is the power produced by its engine. Yes, it is that simple. The term was coined by JamesWatt, the father of energy and power study.
Talking about the mathematical definition, One horsepower = Power required to move 500 pounds to one foot in one second.
A horsepower is thus a unit of power.
Another famous unit of power is watt. The relation between watt and horsepower is one hp= 1.34 *one kilowatt
Thus, a 60kilowatt motor has 60x1.34 = 80.4 horsepower.
You either opt for fuel mileage, or you can opt for horsepower. Getting both is tough. – Mike FordFor the value of acceleration of gravity g= 9.80665 m/s2, 1 mechanical horsepower (1 hp) =, 33,000 ftlbf/min≈ 746 W
This generally defines the poundforce or the kilogramforce.
For the value of acceleration of gravity g= 9.80665 m/s2, 1 metric horse power = 75 kgf⋅m/s
This is approximately equal to 735.499 W, or 98.6% of an imperial mechanical horsepower.
One electrical horsepower = 746 W
This is the most used terminology for electrical machine rating in the US.
This one has a slightly different definition compared to that of standard horsepower.
One boiler horsepower is the power needed for the heat energy required to 34.5 lb of fresh water at 212 °F in one hour.
Boiler horsepower is the most standard accepted notation of power in Australia. One Boiler horsepower hp(S)≡ 33,475 BTU/h= 9,812.5 WOur horsepower calculator is userfriendly and lets you calculate the horsepower of any engine easily. All you have to do is enter the values of force, distance and time in the units you desire and click calculate.
All the various values of horsepower will be displayed to you in a snap of time!
Life is 440 horsepower in a 2cylinder engine.  Henry Miller