Horsepower

Horsepower, abbreviated as HP, is a measure of power or the rate of doing work. It is typically used to describe the work of an engine or machine and is the equivalent of moving 33,000 pounds through the distance of one foot in one minute.

HP Conversion Factor:

• 1 boiler horsepower = 9,809.5 W
• 1 horsepower = 745.699872 or 746 W
• 1 horsepower = 0.746 kW
• 1 Metric horsepower = 735.49875 W
• 1 horsepower = 33,000 lb-ft/min
• 1 horsepower = 550 lb-ft/s
• 1 horsepower = 2544.434187 or 2545 BTU
• 1 horsepower = 3960 gal/min/foot
• 1.341 horsepower = 1 kW
• 1 cu-ft/sec = 448 GPM
• 1 PSI = a head of 2.309 ft (water weight)

 

Horsepower formulas

\(\large{ HP = \frac{ F \; d }{ t }   }\)
\(\large{ HP = \frac{ \tau \; s }{ 5252 }   }\)
\(\large{ HP = W \; \frac{ v }{ 234^2 }  }\)

Where:

\(\large{ HP }\) = horsepower

\(\large{ d }\) = distance (ft)

\(\large{ F }\) = force (lb)

\(\large{ s }\) = speed (rpm)

\(\large{ \tau }\)  (Greek symbol tau) = torque

\(\large{ v }\) = velocity

\(\large{ W }\) = weight

 

horsepower conversion table

Horsepower Conversion Table
Multiply	By	To get
	2545.45766	BTU per hour, BTU/hr
	42.42429433	BTU per minute, BTU/min
	0.707071572	BTU per second, BTU/sec
	1980796.979	foot pound-force per hour
	33013.28298	foot pound-force per minute
	550.221383	foot pound-force per second
	1	horsepower, hp
	17702.8489	pound square foot per cubic second
	0.212121472	ton of refrigeration, ton
	2.6856E+13	dyne centimeter per hour
	4.476E+11	dyne centimeter per minute
	7460000000	dyne centimeter per second
	2685600	joule per hour
	44760	joule per minute
	746	joule per second
	746	watt, W
	0.746	kilowatt, kW
	0.000746	megawatt, MW
	0.000000746	gigawatt, GW
	2685600	newton meter per hour
	44760	newton meter per minute
	746	newton meter per second