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.
Electricity here costs between 41 and 47 cents per kilowatt-hour, tripling the national average. Geoff Watkinson, San Diego Union-Tribune, 29 Jan. 2026 The full complex is expected to generate more than 60 billion kilowatt-hours of electricity each year. Aamir Khollam, Interesting Engineering, 28 Jan. 2026 No one confuses kilowatt-hours with productivity, yet no serious economy flies blind without tracking them. Noosheen Hashemi, Time, 26 Jan. 2026 Since Exelon’s acquisition in 2012, BGE’s electric rates have about doubled, rising from 2.5 cents/kilowatt-hour (kWh) in 2012 to 4.9 cents/kWh this year. David S. Lapp, Baltimore Sun, 26 Jan. 2026 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 3 Feb. 2026.

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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