“one hour and thirty minutes“
Hour and a half = 1 hour + 1 half (one hour) = 90 minutes. . The meaning of “hour and a half” is exactly the same as “hour and a half”.
It’s “an hour and a half” because it means (an hour) + (half an hour) equals = “an hour and a half” (which means more than an hour). As you know, anything that counts more than one is already considered PLURAL, so don’t get confused about that.
So 1.5 hours is 1 hour and 30 minutes.
for a period of 30 minutes.
However, for the special case of 1.5 hours, the usual expression is “one and a half hours“. This usage is so common that “hour and a half” actually sounds strange.
An hour (symbol: h; also abbreviated hr) is a unit of time, conventionally calculated as 1⁄24 of a day and scientifically calculated as 3,599–3,601 seconds, depending on conditions. There are 60 minutes in an hour and 24 hours in a day.
This form is usually used just for “hour and a half”, which is actually interchangeable with “hour and a half”. When it comes to plural hours, I would just use “two and a half hours” – or the hyphenated version “two and a half hours”.
Senior member. The plural (hours) is used unless the phrase is used as an adjective (e.g. a 0.5 hour presentation, which in practice would be called “a half-hour presentation” or “a thirty-minute presentation”) . Pronunciation: point five or point five (point five appears to be AE).
It depends on the context. In casual conversation, you could say “one and a half days” or “one and a half days”. However, in a scientific paper, for example, “1.5 days” or “36 hours” can be used.
Calculating hour and a half for hourly workers
Find the hourly rate for an hour and a half by multiplying the standard hourly rate by 1.5.
1.5 hours is correct because it’s over an hour. One would say 1 hour, but 1.5 hours.
Half an hour is a period of 30 minutes.
Definition of half an hour
: 30 minutes I waited half an hour.
“half hour” is an abbreviation of “half [one] hour”. The phrase “half of” is fairly common: “half of the people in the auditorium,” “half of the pie,” etc. In fact, “half of” is so common that your brain automatically inserts “from” after “half.” could”. So “of” is omitted.
Definition on the half hour
Filter. Happens every hour, but at 30 minutes past the hour; ie 08:30, 09:30 etc. Trains run from here to New York every half hour. Adverb.