kilowatt-hour

noun

kilo·​watt-hour ˈki-lə-ˌwät-ˈau̇(-ə)r How to pronounce kilowatt-hour (audio)
ˈkē-lə-
: a unit of work or energy equal to that expended by one kilowatt in one hour or to 3.6 million joules

Examples of kilowatt-hour in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The facility can deliver up to 600,000 kilowatt-hours (kWh) of electricity per discharge cycle. Chris Young, Interesting Engineering, 29 Dec. 2025 And adding size and storage capacity to them significantly decreases cost per kilowatt-hour. IEEE Spectrum, 21 Dec. 2025 That descent has been estimated to have the potential to generate some 300 billion kilowatt-hours of electricity annually – roughly triple the output of China’s Three Gorges Dam, currently the world’s most powerful. Simone McCarthy, CNN Money, 17 Dec. 2025 That rate hike could increase the monthly bill for residents using 1,000 kilowatt-hours of electricity by around $10. Jordan Smith, IndyStar, 17 Oct. 2025 See All Example Sentences for kilowatt-hour

Word History

First Known Use

1892, in the meaning defined above

Time Traveler
The first known use of kilowatt-hour was in 1892

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Cite this Entry

“Kilowatt-hour.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/kilowatt-hour. Accessed 31 Dec. 2025.

Kids Definition

kilowatt-hour

noun
: a unit of work or energy equal to that expended by one kilowatt in one hour and equal to 3.6 million joules

Medical Definition

kilowatt-hour

noun
: a unit of work or energy equal to that expended by one kilowatt in one hour
Last Updated: - Updated example sentences
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