watt-hour

noun

A unit of electrical energy equal to the power of one watt in use for one hour; often used as a unit of electricity consumption. It is equal to 3600 joules.

“Meronym: milliwatt-hour”

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Meanings

nounwatt-hour (plural watt-hours)

plural watt-hours

  1. A unit of electrical energy equal to the power of one watt in use for one hour; often used as a unit of electricity consumption. It is equal to 3600 joules.

    Meronym: milliwatt-hour

    1 more example

    Holonyms: kilowatt-hour < megawatt-hour < gigawatt-hour < terawatt-hour

Origin

From watt + hour.

Full word history & related roots →

Translations

Bulgarian ва́тча́с
  • ва́тча́с (vátčás)unit of electrical energy equal to the power of one watt in use for one hour
Czech watthodina
  • watthodinaunit of electrical energy equal to the power of one watt in use for one hour
Finnish wattitunti
  • wattituntiunit of electrical energy equal to the power of one watt in use for one hour
French wattheure
  • wattheureunit of electrical energy equal to the power of one watt in use for one hour
German Wattstunde
  • Wattstundeunit of electrical energy equal to the power of one watt in use for one hour
Greek βατώρα
  • βατώρα (vatóra)unit of electrical energy equal to the power of one watt in use for one hour
Irish vatuair
  • vatuairunit of electrical energy equal to the power of one watt in use for one hour
Polish watogodzina
  • watogodzinaunit of electrical energy equal to the power of one watt in use for one hour
Cite this entry
APA

watt-hour. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/watt-hour

MLA

“watt-hour.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/watt-hour. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “watt-hour,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/watt-hour.

Source: watt-hour on Wiktionary, CC BY-SA 4.0.