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Here (https://www.health.harvard.edu/staying-healthy/how-much-water-should-you-drink) it says to drink four-to-six cup of water.

I find it weird that they don't mention how big the cup should be? How many liters should the cup contain? 0.2L?

I've seen other places mentioning cups. So what size are cups assumed in such cases?

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  • Are you talking about the size of a glass of water or a cup measurement as in baking? – jbrahy Apr 9 at 23:20
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A cup is a non-standard unit of measurement for volume:

https://en.wikipedia.org/wiki/Cup_(unit)

It usually varies between 200ml and 250ml.

In the U.S., it is 2.365882365 decilitres exactly (which is 236.5882365 millilitres exactly).

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  • Seeing as the OP is using a US source, maybe you could point out the US standard for a 1 cup measure? – Chris Rogers Apr 1 at 14:54
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    @ChrisRogers; have done – JMP Apr 1 at 14:59
  • lol... he's talking about something to hold the water. Not a volumetric size. He's asking how big the cup should be. i.e. 8oz 12oz 16oz (or ml) – jbrahy Apr 2 at 16:49
  • @jbrahy - The OP may be asking how big the cup should be, but the answer explains that the cup being mentioned in many sources is a unit of fluid volume measurement. Perfectly good answer and explanation. – Chris Rogers Apr 9 at 9:01

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