one and a half hours vs one and a half hour

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

Last updated: March 15, 2024 • 8508 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 [+]

Leave to cook for about one and a half hours.
Still one and a half hours. just do anything.
You should allow about one and a half hours for that in total.
Depending on how and when the drug works for you, an interval of one and a half hours to as much as 4 hours may prove ideal.
Season with salt and add a little chilli pepper, cover and cook over a moderate heat for about one and a half hours.
The whole is placed in a pot, Pour 1,5 liter of water and boil for approximately one and a half hours, until the meat is tender.
We used to have one and a half hours with the Council at the beginning of the evening session.
You had one and a half hours from 10:30 to finish that song.
HE GIGGLES This television is going to be on one and a half hours every evening.
In about one and a half hours I am supposed to be flying to Croatia.
Libyan engineers managed to improvise another relay antenna and the program finally went on one and a half hours late.
Someone who takes one and a half hours to draw that is persistent.
The Conference of Presidents envisaged that Question Time would last one and a half hours; then the President reduced it to an hour.
The victims of this poor service arrived at the check-in with their escorts in very good time, around one and a half hours before the flight's scheduled departure time of 16.45.
Yesterday, for instance, during the vote, 39 reports were dealt with in one and a half hours which is probably something of a record.
Our thanks go to Commissioner Fischler for making himself available for almost one and a half hours to answer our questions here.
In this way, all the tumour cells in your limb can be exposed to a very high dose of the medicines for one and a half hours, providing the best possible anti-tumour effect.
Dry the residue maintaining the flask for one and a half hours in the drying oven (4.3).
It took until November 30, 2010, for the Pingtan Straits Bridge to be completed, reducing the trip from Fuzhou to Pingtan to one and a half hours.
That poor little girl was waiting outside for one and a half hours!

Alternatives:

an hour and a half
ninety minutes