Watt

Watt
Unit systemSI derived unit
Unit ofPower
SymbolW
Named afterJames Watt
Unit conversions
1 W in ...... is equal to ...
SI base units   kgm2s−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,[1] and is used to quantify the rate of energy transfer. In dimensional analysis it is described by ${\displaystyle {\mathsf {ML}}^{2}{\mathsf {T}}^{-3}}$.[2]

Examples

When an object's velocity is held constant at one meter per second against a constant opposing force of one newton, the rate at which work is done is 1 watt.

${\displaystyle \mathrm {1~W=1~{\frac {J}{s}}=1~{\frac {N{\cdot }m}{s}}=1~{\frac {kg{\cdot }m^{2}}{s^{3}}}} }$

In terms of electromagnetism, one watt is the rate at which electrical work is performed when a current of one ampere (A) flows across an electrical potential difference of one volt (V).

${\displaystyle \mathrm {1~W=1~V\cdot 1~A} }$

Two additional unit conversions for watt can be found using the above equation and Ohm's Law.

${\displaystyle \mathrm {1~W=1~{\frac {V^{2}}{\Omega }}=1~A^{2}{\cdot }\Omega } }$

Where ohm (${\displaystyle \Omega }$) is the SI derived unit of electrical resistance.

• A person having a mass of 100 kilograms who climbs a 3-meter-high ladder in 5 seconds is doing work at a rate of about 600 watts. Mass times acceleration due to gravity times height divided by the time it takes to lift the object to the given height gives the rate of doing work or power.[i]
• A laborer over the course of an 8-hour day can sustain an average output of about 75 watts; higher power levels can be achieved for short intervals and by athletes.[3]
Other Languages
العربية: واط
aragonés: Watt
asturianu: Vatiu
azərbaycanca: Vatt
বাংলা: ওয়াট
Bân-lâm-gú: Óa
башҡортса: Ватт
беларуская (тарашкевіца)‎: Ват
български: Ват
བོད་ཡིག: ཝ་ཐི།
bosanski: Vat
brezhoneg: Watt
català: Watt
Чӑвашла: Ватт
čeština: Watt
Cymraeg: Wat
dansk: Watt
eesti: Vatt
español: Vatio
Esperanto: Vato (mezurunuo)
euskara: Watt
فارسی: وات
Fiji Hindi: Watt
français: Watt
furlan: Wat
Gaeilge: Vata
galego: Watt

한국어: 와트
हिन्दी: वॉट
hrvatski: Vat
Bahasa Indonesia: Watt
interlingua: Watt
íslenska: Vatt
italiano: Watt
עברית: ואט
къарачай-малкъар: Ватт
ქართული: ვატი
қазақша: Ватт
Kiswahili: Wati
Kreyòl ayisyen: Wat
kurdî: Wat
Latina: Vattium
latviešu: Vats
lietuvių: Vatas
Limburgs: Watt
lumbaart: Watt
македонски: Ват
മലയാളം: വാട്ട്
मराठी: वॅट
مصرى: وات
Bahasa Melayu: Watt
монгол: Ватт (нэгж)
မြန်မာဘာသာ: ဝပ်
Nederlands: Watt (eenheid)
नेपाल भाषा: वाट

Nordfriisk: Watt (ianhaid)
norsk: Watt
norsk nynorsk: Watt
occitan: Watt
oʻzbekcha/ўзбекча: Vatt
ਪੰਜਾਬੀ: ਵਾਟ
پنجابی: واٹ
Patois: Wat
Piemontèis: Watt
polski: Wat
português: Watt
română: Watt
русский: Ватт
Scots: Watt
shqip: Watt
sicilianu: Watt
Simple English: Watt
slovenčina: Watt (jednotka)
slovenščina: Vat
کوردی: وات
српски / srpski: Ват
srpskohrvatski / српскохрватски: Vat
suomi: Watti
svenska: Watt
Tagalog: Watt
tarandíne: Watt
татарча/tatarça: Ватт
తెలుగు: వాట్
ไทย: วัตต์
Türkçe: Watt
тыва дыл: Ватт
українська: Ват
اردو: واٹ
vèneto: Watt
Tiếng Việt: Watt
Winaray: Watt

žemaitėška: Vats