Power Conversion Calculator

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Convert Power and Heat Flow

From:

To:

↕

Value to Convert

Answer:

= 0.7457 kW

Divide by 1.341
for quick conversions

hp / 1.341 = kW

Solution

To convert hp to kW, use the conversion factor

1 kW = 1.34102186 hp

then divide both sides of the equation by kW, to get the conversion ratio

1 = 1.34102186 hp / kW

Use the conversion ratio to complete the unit conversion, basically dividing the input by 1, the hp units cancel out, and we are left with kW units.

1 hp ÷ 1.34102186 hp / kW
= 0.7457 kW

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Calculator Use

Convert among units of power and heat flow.

(IT) = International Table
(th) = Thermochemical

How to Convert Units of Power and Heat Flow

Conversions are performed by using a conversion factor. By knowing the conversion factor, converting between units can become a simple multiplication problem:

S * C = E

Where S is our starting value, C is our conversion factor, and E is our end converted result.

To simply convert from any unit into W, for example, from 50 BTU/h, just multiply by the value in the right column in the table below.

50 BTU/h * 0.2930711 [ (W) / (BTU/h) ] = 14.653555 W

To convert from W into units in the left column divide by the value in the right column or, multiply by the reciprocal, 1/x.

14.653555 W / 0.2930711 [ (W) / (BTU/h) ] = 50 BTU/h

To convert among any units in the left column, say from A to B, you can multiply by the factor for A to convert A into W then divide by the factor for B to convert out of W. Or, you can find the single factor you need by dividing the A factor by the B factor.

For example, to convert from BTU/h (th) to cal/s (th) you would multiply by 0.2928751 then divide by 4.184. Or, multiply by 0.2928751/4.184 = 0.069998829. So, to convert directly from BTU/h (th) to cal/s (th) you multiply by 0.069998829.

Table of Power and Heat Flow Conversions

Note that you must first complete the operations in the Multiply By column in order to have the correct factor. For example, converting calorie per hour (IT) to watts, 4.1868/60/60 is 4.1868 divided by 60, divided by 60 which is equal to 0.001163. They were left in this form so that you could calculate a more accurate conversion factor.

Units, symbols and conversion values
used in this power and heat flow calculator

To Convert from
Unit

Unit
Symbol

and Convert to
(W)

Multiply by
( W / Unit )

BTU [IT] per hour

BTU_IT/h

watt

0.2930711

BTU [IT] per minute

BTU_IT/min

watt

0.2930711*60

BTU [IT] per second

BTU_IT/s

watt

0.2930711*60*60

calorie [IT] per hour

cal_IT/h

watt

4.1868/60/60

calorie [IT] per minute

cal_IT/min

watt

4.1868/60

calorie [IT] per second

cal_IT/sec

watt

4.1868

BTU [th] per hour

BTU_th/h

watt

0.2928751

BTU [th] per minute

BTU_th/min

watt

0.2928751*60

BTU [th] per second

BTU_th/s

watt

0.2928751*60*60

calorie [th] per hour

cal_th/h

watt

4.184/60/60

calorie [th] per minute

cal_th/min

watt

4.184/60

calorie [th] per second

cal_th/s

watt

4.184

cheval-vapeur

watt

735.49875

erg per hour

erg/h

watt

0.0000001/60/60

erg per minute

erg/min

watt

0.0000001/60

erg per second

erg/s

watt

0.0000001

foot-pound-force per hour

ft·lbf/h

watt

1.355818/60/60

foot-pound-force per minute

ft·lbf/min

watt

1.355818/60

foot-pound-force per second

ft·lbf/s

watt

1.355818

foot-poundal per hour

ft·pdl/h

watt

0.04214011/60/60

foot-poundal per minute

ft·pdl/min

watt

0.04214011/60

foot-poundal per second

ft·pdl/s

watt

0.04214011

horsepower (550 ft · lbf/s)

watt

745.6999

horsepower (boiler)

watt

9809.5

horsepower (electric)

watt

746

horsepower (metric)

watt

735.49875

horsepower (mechanical)

watt

745.7

horsepower (water)

watt

746.043

joule per hour

J/h

watt

1/60/60

joule per minute

J/min

watt

1/60

joule per second

J/s

watt

kilowatt

watt

1000

pferdestarke

watt

735.49875

watt

References

The National Institute of Standards and Technology (NIST) - The NIST Guide for the use of the International System of Units - Appendix B, subsections B.8 Factors for Units Listed Alphabetically and B.9 Factors for units listed by kind of quantity or field of science.

Lide, David R., Daniel (Editor-in-Chief). CRC Handbook of Chemistry and Physics, 89th Edition New York, NY: CRC Press, p. 1-28, 2008.

Wikipedia contributors. "Conversion of units" Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, last visited 16 Nov. 2010.