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 formula looks like this: Cost = (power (in watts) x time (in hours)) / 1,000 x cost of one kilowatt-hour. John Tufts, USA Today, 27 June 2025 Researchers at Stanford and separately at MIT are developing concrete that can act as a capacitor and store over 10 kilowatt-hours of energy per cubic meter. Andres Clarens, The Conversation, 23 June 2025 Residential electricity prices in the Pacific, Middle Atlantic and New England regions — areas where consumers already pay much more per kilowatt-hour for electricity — could increase more than the national average, according to the EIA. Greg Iacurci, CNBC, 21 June 2025 As of June 1, SMUD residential ratepayers had an average monthly bill of $145 using 750 kilowatt-hours per month. Olivia Cyrus, Sacbee.com, 20 June 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 13 Jul. 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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