One and half hour



In general, for some number of hours, plus some fraction of an hour, you"d use the number, plus the fraction, plus "hours", plural. "Four and a half hours.", "Three & three-quarters hours," etc.

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However, for the specific case of 1.5 hours, the usual expression is "an hour & a half". This usage is so comtháng that "One & a half hours" actually sounds strange.


One & a half hours

English is a bit strange, if I"m talking about exactly one hour, then I say hour và not hours. For every other number, I use plural. This applies to lớn every noun in the English language that has a plural tense:

I have sầu one dollarI have sầu zero dollarsI have sầu 1.1 dollarsI have -1 dollars

I love hearing how English-as-a-second-language persons construct phrases lượt thích this! It"s so fun. I can completely understand what they are trying khổng lồ say, but marvel at how they construct the idea in a way that makes sense lớn them, but would be unusual for a native sầu English speaker.

Here are some ways native English speakers would describe time:

Very common:

"an hour and a half"

"one and a half hours"

"an hour và thirty minutes"


"ninety minutes"

somewhat less common:

"one hour and thirty minutes"


"one hour, thirty minutes"

not used:

"one hour, and one half hour"

"the sum of an hour và half of an hour"

"one hour, plus an additional half hour"

"two hours minus one half hour"

"seventy-five percent of two hours"

Basically, if it sounds like a math equation, it"s probably not used!

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edited Jun 27 "16 at 18:07

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answered Jun 27 "16 at 18:03
code beginnercode beginner
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You can always get out of this conundrum by writing:

An hour và a half


90 minutes

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edited Jan 31 "15 at 11:28
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answered Jan 31 "15 at 7:42
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Other answers discuss writing the quantity as words. When writing things as numerals, however, I would suggest that the decimal fraction .5 as being a perfectly good way of indicating "half". For partial-hour quantities other than 30 minutes, I would avoid other decimal fractions unless times are being measured in six-minute or 36-second intervals, but .5 is so idiomatic as "one half" that I would consider "1.5 hours" to be more readable than "1 hour and 30 minutes" or "1 1/2 hours", or even "1½ hours".

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answered Jan 30 "15 at 21:43
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My interpretation of the debate would be "two & a half hours" VS "two và one half hours". The latter was taught in grade school. Toss the fraction in as you wish.

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answered Mar 15 "18 at 10:40
Norm CrosbyNorm Crosby
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