one and a half hours vs one and a half hour

Both phrases are correct, but they're used in different contexts. 'One and a half hours' is the correct form when referring to a duration of time that's one hour and thirty minutes long. 'One and a half hour' is less common and is typically used in a more informal or conversational context.

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Last updated: January 03, 2025 • 8632 views

one and a half hours

This phrase is correct and commonly used when referring to a duration of one hour and thirty minutes.

This phrase is used to indicate a time duration of one hour and thirty minutes. It is the standard and more formal way to express this time period.

Examples:

The meeting lasted for one and a half hours.
She practiced the piano for one and a half hours every day.
It takes one and a half hours to drive to the beach.
He slept for one and a half hours.
The movie was two hours long, but the director cut it down to one and a half hours.

Show examples from the web [+]
Last updated: November 23, 2024

Jan 30, 2015 ... The usual expression is "an hour and a half". This usage is so common that "One and a half hours" actually sounds strange.
Feb 2, 2014 ... If so, is either more appropriate in different contexts? Example context: "The Superbowl starts in less than one and a half hours." "The ...
Jul 13, 2010 ... Hi there, I was wondering if "an hour and a half" is correct in English. I know "one and a half hours" is more idiomatic, but is it the only ...
Aug 23, 2023 ... Ok so in Aus English, we'd say "an hour and a half" or "one and a half hours". But for everything more than one hour it would always be "two ...
It is "one and a half hours" because you have more than one hour ( one hour plus half an hour ) hence implying that it is plural and not just a single hour.
Jun 2, 2022 ... Neither of the above is correct. We say ' one and a half hours' followed by the verb in the singular. ' One and a half hours is long enough for a western ...
Oct 29, 2008 ... How can I set cron to run certain commands every one and a half hours? ... (one and a half hours) if [[ $(($minutesSinceEpoch % 90)) -ne 0 ]]; ...
Mar 9, 2017 ... One and a half hours until Liza Minnelli and Michael Feinstein go #FacebookLive. Remember to "like" and "follow" Michael's page for a ...
Jun 9, 2021 ... Also have a look at the answers here (if Abeez Journal allows links to “colleague sites”):. Is it one and a half hour or one and a half hours?
Jul 31, 2021 ... Jack can read 45 pages of his book in one and a half hours. At that rate, how long will it take him to read the entire 300-page book? All ...

Alternatives:

an hour and a half
ninety minutes

one and a half hour

This phrase is also correct but is less common and used in informal contexts.

This phrase is used informally or conversationally to refer to a duration of one hour and thirty minutes. It is less formal than 'one and a half hours.'