How long can a human go without water?


Quick Answer

Under excellent conditions, a human in decent physical shape can live up to five days without water, according to HowStuffWorks. A human in even better shape may survive another 24 hours or more.

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Full Answer

One week appears to be the maximum length of time any human can go without water, an article in Business Insider says, and three or four days is a reasonable average. In extreme heat, a human cannot survive as long without water, and when temperatures are cool, a human can live somewhat longer. A person who is overly physically active in severe heat conditions can die in a few hours if he consumes no fluid, points out HowStuffWorks.

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