Power units converter
Power units converter. This calculator converts between horsepower, wats and over a dozen other power units.

How to convert

  • Enter the number to field "value" - enter the NUMBER only, no other words, symbols or unit names. You can use dot (.) or comma (,) to enter fractions.
    Examples:
    • 1000000
    • 123,23
    • 999.99999
  • Find and select your starting unit in field "unit". Some unit calculators have huge number of different units to select from - it's just how complicated our world is...
  • And... you got the result in the table below. You'll find several results for many different units - we show you all results we know at once. Just find the one you're looking for.

Inputs data - value and unit, which we're going to convert

value
unit
decimals

1 (wat) is equal to:

watt

unitsymbolvalue
milliwatt
mW
1000
wat
W
1
joule per second
W
1
kilowatt
kW
0.001
megawatt
MW
0.000001
gigawatt
GW
1×10-9

horse power

unitsymbolvalue
horsepower (metric)
hp
0.001359622
horsepower (mechanical)
hp
0.001341022
horsepower (electrical)
hp
0.001340483
boiler horsepower
0.000101942

foot

unitsymbolvalue
foot-pound-force per hour
ft lbf/h
2655.2237374
foot-pound-force per minute
ft lbf/min
44.253728957
foot-pound-force per second
ft lbf/s
0.737562149
atmosphere cubic foot per hour
atm·cfh
1.254703185
atmosphere cubic foot per minute
atm·cfm
0.02091172
atmosphere cubic foot per second
atm·cfs
0.000348529

metre

unitsymbolvalue
atmosphere cubic centimetre per hour
atm cch
35529.2376018
atmosphere cubic centimetre per minute
atm ccm
592.15396003
atmosphere cubic centimetre per second
atm ccs
9.869232667
litre-atmosphere per hour
L·atm/h
35.529237602
litre-atmosphere per minute
L·atm/min
0.59215396
litre-atmosphere per second
L·atm/s
0.009869233
poncelet
p
0.001019716

BTU

unitsymbolvalue
BTUIT per hour
BTUIT/h
3.412141633
BTUIT per minute
BTUIT/min
0.056869027
BTUIT per second
BTUIT/s
0.000947817

other

unitsymbolvalue
calorie (International Table) per hour
calIT/h
859.845227859
calorie (International Table) per minute
calIT/m
14.330753798
calorie (International Table) per second
calIT/s
0.238845897
lusec
L·µmHg/s
7500.001875
square foot equivalent direct radiation
sq ft EDR
0.014217257
ton of air conditioning
0.001184553
ton of refrigeration (IT)
0.000284345
ton of refrigeration (Imperial)
0.00025388

Some facts

  • Power determines the work done by a physical system in given time unit.
  • Power is a scalar. It means that it has no direction.
  • Basic power unit in SI system is 1W (one watt). Power has 1W value, when system done work 1 joule in time of 1 second.
  • The instantaneous power is defined as a derivative of work dW/dt.
  • To calculate the average power over a period of time <t0, t1>, we need to compute integral Pavg. = 1/(t1-t0) × ∫p</sub>(t)dt.
  • If work is constant (time independent), we can compute average power in simpler way using formula: Pavg.=W/t, where W is work and t is time.
  • The power consumed by the electric device can be calculated using the formula: P=U×I, where U is the voltage and I the intensity of the electric current. This property is used, eg. by popular power meters available on the market, which measure the electric power consumed by the device.
  • In alternative way, power can be understood as speed of energy emission.
  • If certain electric device charge e.g. 60W of power, then the same amount of power is emitted to the outside. This follows from the principle of conservation of energy. Almost all energy consumed by electrical devices is emitted as heat. This problem has become particularly noticeable with the rapid development of computers. In the early 90s processors found in personal computers do not required special cooling. Beggining from 586 (Pentium), the CPU fan has become an integral part of any personal computer.

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"Calculla v1" version of this calculatorIn December 2016 the Calculla website has been republished using new technologies and all calculators have been rewritten. Old version of the Calculla is still available through this link: v1.calculla.com. We left the version 1 of Calculla untouched for archvial purposes.
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