How long can a human survive with out water?

Answer 1

In general, humans can survive for two to eight weeks without food, depending on stored body fat. Survival without water is usually limited to three or four days.

-wikipidia

http://en.wikipedia.org/wiki/Human#Diet

At least for a week, a human body can survive with water only.

Answer 2

3 days or less, without systemic damage. It depends on the temperature and humidity. Hot dry conditions, such as found in a desert, will dehydrate us sooner than moderate temperatures and humidity.

Answer 3

We are made mostly of water. Our brain is in fact 80% water. We can survive no more than a few days without drinking any. Of course, this will vary depending on active you are - how much you sweat etc.

However, water doesn't have to come directly from our food and drink. Respiratory water is produced as a by-product of aerobic respiration:

C6H12O6 + 6O2 -----> 6CO2 + 6H2O (+ energy)

Camels don't store water in their humps. They store fat, which then turns into water when it's metabolised. Same with humans - kind of...

Answer 4

That may vary depending on the environment; in a hot dry desert he may not last more than a day or two; in a very humid climate you might be able to last up to 7 days at most.

Answer 5

About 13 days without water that's the record.but on average a week (if you live in a comfortable temperature area if you live in the Sahara desert a day);- )

Answer 6

without water a human can only live a few days (that means without water, hot drinks, fizzy drinks...etc)

Answer 7

depending on the temperature of the enviornment, it can range anywhere from 2-10 days

Answer 8

Probably 2-5 days without water.