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 researchers also calculated that one of their supercapacitors could store around 10 kilowatt-hours—enough to serve about one third of an average American’s daily energy use—though the number is only theoretical. Perri Thaler, IEEE Spectrum, 22 Oct. 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 Under the agreement, the county secures a fixed electricity rate of 14 cents per kilowatt-hour, providing long-term cost stability and protecting taxpayers from future energy price fluctuations. Jijo Malayil, Interesting Engineering, 11 Oct. 2025 Solar owners will now be compensated less than 3 cents per kilowatt-hour for most of the year, with higher rates only during peak hours in the summer. Angela Palermo, Idaho Statesman, 2 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

Browse Nearby Words

Cite this Entry

“Kilowatt-hour.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/kilowatt-hour. Accessed 29 Oct. 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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!