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

Built to handle demanding mining operations Their work produced the LK220E, a 140-ton battery-electric haul truck with a 770-kilowatt-hour battery pack. — Sujita Sinha, Interesting Engineering, 22 June 2026

Bloomberg New Energy Finance found that new lithium-ion battery pack prices for stationary storage fell to roughly $70 per kilowatt-hour in 2025, a decline of about 45% from the previous year. — Ken Silverstein, Forbes.com, 21 June 2026

Every kilowatt-hour of electricity consumed by AI data centers should be matched by new, clean energy added to the same grid at the same time. — Patricia J. Kissinger, STAT, 18 June 2026

Multiply your home's cost per kilowatt-hour for electricity by 10. — Camila Domonoske, NPR, 22 May 2026

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