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

Unit | Symbol | Symbol (plain text) | Value |

milliwatt | $mW$ | mW | 1000 |

wat | $W$ | W | 1 |

joule per second | $\frac{J}{s}$ | J/s | 1 |

kilowatt | $kW$ | kW | 0.001 |

megawatt | $MW$ | MW | 0.000001 |

gigawatt | $GW$ | GW | 1×10^{-9} |

Unit | Symbol | Symbol (plain text) | Value |

metric horsepower | $hp(M)$ | hp(M) | 0.001359622 |

mechanical horsepower | $hp(I)$ | hp(I) | 0.001341022 |

eletrical horsepower | $hp(E)$ | hp(E) | 0.001340483 |

boiler horsepower | $hp(S)$ | hp(S) | 0.000101942 |

Unit | Symbol | Symbol (plain text) | Value |

foot-pound-force per hour | $\frac{ft \times lbf}{h}$ | ft·lbf / h | 2655.2237374 |

foot-pound-force per minute | $\frac{ft \times lbf}{min}$ | ft·lbf / min | 44.253728957 |

foot-pound-force per second | $\frac{ft \times lbf}{s}$ | ft·lbf / s | 0.737562149 |

atmosphere cubic foot per hour | $\frac{atm \times ft^3}{h}$ | atm·cfh | 1.254703185 |

atmosphere cubic foot per minute | $\frac{atm \times ft^3}{min}$ | atm·cfm | 0.02091172 |

atmosphere cubic foot per second | $\frac{atm \times ft^3}{s}$ | atm·cfs | 0.000348529 |

Unit | Symbol | Symbol (plain text) | Value |

atmosphere cubic centimetre per hour | $\frac{atm \times cm^3}{h}$ | atm·cch | 35529.2376018 |

atmosphere cubic centimetre per minute | $\frac{atm \times cm^3}{min}$ | atm·ccm | 592.15396003 |

atmosphere cubic centimetre per second | $\frac{atm \times cm^3}{s}$ | atm·ccs | 9.869232667 |

litre-atmosphere per hour | $\frac{l \times atm}{h}$ | l·atm/h | 35.529237602 |

litre-atmosphere per minute | $\frac{l \times atm}{min}$ | l·atm/min | 0.59215396 |

litre-atmosphere per second | $\frac{l \times atm}{s}$ | l·atm/s | 0.009869233 |

poncelet | $p$ | p | 0.001019716 |

Unit | Symbol | Symbol (plain text) | Value |

BTU_{IT} per hour | $\frac{BTU_{IT}}{h}$ | BTU_{IT}/h | 3.412141633 |

BTU_{IT} per minute | $\frac{BTU_{IT}}{min}$ | BTU_{IT}/min | 0.056869027 |

BTU_{IT} per second | $\frac{BTU_{IT}}{s}$ | BTU_{IT}/s | 0.000947817 |

Unit | Symbol | Symbol (plain text) | Value |

calorie (International Table) per hour | $\frac{cal_{IT}}{h}$ | cal_{IT}/h | 859.845227859 |

calorie (International Table) per minute | $\frac{cal_{IT}}{min}$ | cal_{IT}/min | 14.330753798 |

calorie (International Table) per second | $\frac{cal_{IT}}{s}$ | cal_{IT}/s | 0.238845897 |

lusec | $\frac{l \times \mu mHg}{s}$ | L·µmHg/s | 7500.001875 |

square foot equivalent direct radiation | $\text{sq ft EDR}$ | sq ft EDR | 0.014217257 |

ton of air conditioning | $\text{ton AC}$ | ton AC | 0.001184553 |

ton of refrigeration (IT) | $TR$ | TR | 0.000284345 |

ton of refrigeration (Imperial) | $TR_{UK}$ | TR (UK) | 0.00025388 |

- 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:

$1W = 1J/1s$ - The instantaneous power is defined as a derivative of work:

$P = \frac{dW}{dt}$ - To calculate the average power over a period of time $[t_0, t_1]$, we need to compute integral:

$P_{avg.} = \frac{1}{t_1 - t_0} \times \int\limits_{t_0}^{t_1} P(t) dt$ - If work is constant (time independent), we can compute average power in simpler way using formula:

$P_{avg.}=\frac{W}{t}$where:

- W is work,

- t is time.

- W is work,
- The power consumed by the electric device can be calculated using the formula:

$P = U \times I$where:

- U is the voltage,

- I the intensity of the electric current.

- U is the voltage,
- 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.

**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.

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