kilowatt-hour

noun

kilo·​watt-hour ˈki-lə-ˌwät-ˈau̇(-ə)r 

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

Electricity In April, the average price of electricity nationwide was 18 cents per kilowatt-hour. —Claire Malon, Chicago Tribune, 15 May 2025

The average cost of battery packs for EVs dropped 20% to $115 per kilowatt-hour in 2024, according to a BloombergNEF battery price survey released in December. —Michael Wayland, CNBC, 13 May 2025

According to an annual Energy Star report released by the EPA in May 2024, the program has saved more than five trillion kilowatt-hours of electricity since 1992 and has prevented four billion metric tons of greenhouse gas emissions in the same period. —Stephanie Pappas, Scientific American, 8 May 2025

That translates to around 278 kilowatt-hours, or enough to charge a standard Hyundai Ioniq 6 nearly six times over. —New Atlas, 23 Apr. 2025

Word History

First Known Use

1892, in the meaning defined above

Rhymes for kilowatt-hour

• candlepower
• cauliflower
• overpower
• superpower
• vavasour
• waterpower
• airpower
• brainpower
• devour
• empower
• firepower
• horsepower

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