# Watt, Power

Watt, symbol W, in the SI unit of power. The unit is named after of the Scotch-Irish inventor-engineer James Watt, the creator of universal steam engine. Watt is defined defined as one joule per second and measures the rate of energy conversion or transfer. Thus Watt is a derived unit and is connected with other units of the SI by the following relations:Read more
W = J / s = kg · m2 / s3
W = H · m / s
W = V · A

List of all Watt to other power units individual converters.
Convert  Watt

### SI derived

Attowatt aW 10000000000×108
Femtowatt fW 10000000000×105
Picowatt pW 10000000000×102
Nanowatt nW 1000000000
Microwatt µW 1000000
Milliwatt mW 1000
Centiwatt cW 100
Deciwatt dW 10
Decawatt daW 0.1
Hectowatt hW 0.01
Kilowatt kW 0.001
Megawatt MW 10-6
Gigawatt GW 10-9
Terawatt TW 10-14
Petawatt PW 10-15
Exawatt EW 10-18

### Joule based

Attojoule per second aJ/s 10000000000×108
Attojoule per hour aJ/h 3.6×10-15
Femtojoule per second fJ/s 10000000000×105
Femtojoule per hour fJ/h 3.6×10-12
Picojoule per second pJ/s 10000000000×102
Picojoule per hour pJ/h 3.6×10-9
Nanojoule per second nJ/s 1000000000
Nanojoule per hour nJ/h 3.6×10-6
Mircojoule per second µJ/s 1000000
Microjoule per hour µJ/h 0.0036
Joule per hour J/h 3600
Decajoule per hour daJ/h 36000
Hectojoule per hour hJ/h 360000
Kilojoule per hour kJ/h 3600000
Megajoule per hour MJ/h 3600000000
Gigajoule per minute 6000000000×101
Gigajoule per hour GJ/h 3600000000×103
Terajoule per minute 6000000000×104
Terajoule per hour TJ/h 3600000000×106
Petajoule per minute 6000000000×107
Petajoule per hour PJ/h 3600000000×109
Exajoule per second EJ/s 10-18
Exajoule per minute 6000000000×1010
Exajoule per hour EJ/h 3600000000×1012

### Horsepower

Horsepower hp 0.0013
Horsepower (metric) hp(M) 0.0014
Horsepower (boiler) hp(S) 0.0001

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