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

Value | ||

Unit | ||

Decimals |

# 1 (wat) is equal to:

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

milliwatt | Show source$mW$ | mW | 1000 |

wat | Show source$W$ | W | 1 |

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

kilowatt | Show source$kW$ | kW | 0.001 |

megawatt | Show source$MW$ | MW | 0.000001 |

gigawatt | Show source$GW$ | GW | 1×10^{-9} |

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

poncelet | Show source$p$ | p | 0.001019716 |

# BTU

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

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

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

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

# other

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

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

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

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

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

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

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

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

ton of refrigeration (Imperial) | Show source$TR_{UK}$ | TR (UK) | 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:

$1W = 1J/1s$ - 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.

# 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.

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# Ancient version of this site - links

In 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 archival purposes.

Direct link to the old version: "Calculla v1" version of this calculator

Direct link to the old version: "Calculla v1" version of this calculator