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 utility profits $0.53 per kilowatt-hour with zero investment. U T Readers, San Diego Union-Tribune, 6 June 2025 Lithium-ion batteries, by contrast, store just a fraction of that, about 0.25 kilowatt-hours per kilogram. James Pikul, The Conversation, 2 June 2025 The average residential customer using 900 kilowatt-hours per month would see their bill rise by about $21.66, or 17.35%. Angela Palermo, Idaho Statesman, 31 May 2025 Nuclear has the lowest mortality rate per kilowatt-hour among major energy sources. Bill Frist, Forbes.com, 29 May 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 12 Jun. 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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