Merriam-Webster Online DictionarykW (abbreviation)
« Back to Glossary Index
|Unit system||SI derived unit|
|Named after||James Watt|
|1 W in ...||... is equal to ...|
|SI base units||kg⋅m2⋅s−3|
|CGS units||1×107 erg s−1|
The watt (symbol: W) is a unit of power. In the International System of Units (SI) it is defined as a derived unit of 1 joule per second, and is used to quantify the rate of energy transfer. In dimensional analysis, power is described by .