1.5 hours vs 1.5 hour

Both "1.5 hours" and "1.5 hour" are correct, but they are used in different contexts. "1.5 hours" is used when referring to a duration of time that is more than one hour, while "1.5 hour" is used when referring to a duration of time that is exactly one hour and a half.

Last updated: March 22, 2024 • 2513 views

1.5 hours

This phrase is correct and commonly used in English when referring to a duration of time that is more than one hour.

Use "1.5 hours" when referring to a duration of time that is one hour and thirty minutes or more.

Examples:

The meeting lasted for 1.5 hours.
She worked out for 1.5 hours at the gym.

Show examples from the web [+]

Aqueous humour concentrations declined with a half-life of approximately 1.5 hours.
The average half-life is of about 1.5 hours.
In healthy young men, an oral 3 mg dose decreases acetylcholinesterase (AChE) activity in CSF by approximately 40% within the first 1.5 hours after administration.
In healthy young men, an oral 3 mg dose decreases acetylcholinesterase (AChE) activity in CSF by approximately 40% within the first 1.5 hours after administration.
The mean half-life of abacavir is about 1.5 hours.
Stiripentol is quickly absorbed, with a time to peak plasma concentration of about 1.5 hours.
Loratadine and DL achieve maximum plasma concentrations (Tmax) between 1- 1.5 hours and 1.5- 3.7 hours after administration, respectively.
Plasma elimination half-life for trimethoprim in poultry is less than 1 hour and that of sulfamethoxazole, approximately 1.5 hours.
Absorption Lenalidomide, in healthy volunteers, is rapidly absorbed following oral administration with maximum plasma concentrations occurring between 0.625 and 1.5 hours post-dose.
Plasma concentrations decline rapidly and the elimination half-life of nateglinide typically averaged 1.5 hours in all studies of Starlix in volunteers and type 2 diabetic patients.
Serum concentrations appear after a median lag time of 0.25 hours (range 0 to 1.5 hours).
The distribution half-life was approximately 1.5 hours; the route of excretion is essentially renal with 41% of the radiolabel excreted in urine over the first 24 hours after administration.
After oral administration to adult patients, TMZ is absorbed rapidely, with peak concentrations reached as early as 20 minutes post-administration (mean time between 0.5 and 1.5 hours).
Following oral administration, the mean time (tmax) to maximal serum concentrations of abacavir is about 1.5 hours for the tablet formulation and about 1.0 hour for the solution formulation.
This will take at least 1.5 hours for the maintenance dose and 3 hours for the loading dose.
Absorption Following subcutaneous administration, meloxicam is completely bioavailable and maximal mean plasma concentrations of 0.73 µg/ ml in dogs and 1.1 µg/ ml in cats were reached approximately 2.5 hours and 1.5 hours post administration, respectively.
Length of visit: approx. 1.5 hours.
After oral administration, maximum plasma concentrations (Cmax) of ambrisentan typically occur around 1.5 hours post-dose under both fasted and fed conditions.
maximum plasma concentrations (Tmax) between 1- 1.5 hours and 1.5- 3.7 hours after administration, respectively.
Subsequent to an intramuscular injection of 1 g of ceftriaxone the serum concentration amounted to 79.2 µg/ ml after 1.5 hours, and afterwards 58.2, 35.5 and 7.8 µg/ ml at the respective time-points 4, 12 and 24 hours after injection.

Alternatives:

1.5 hours and 30 minutes
1 hour and 30 minutes
1 hour and a half
90 minutes
an hour and a half

1.5 hour

This phrase is correct and commonly used in English when referring to a duration of time that is exactly one hour and a half.

Use "1.5 hour" when referring to a duration of time that is exactly one hour and thirty minutes.