How Long Does It Take To Rehydrate (And Why)?

Exact Answer: 10 To 20 Hours

There are many health complications that one comes across in their day to day life. Some can be easily cured or the symptoms can be remedied, while others cannot be. Some health problems require serious attention, while some just need to be taken care of at the moment. Among many health problems, dehydration is one thing that many people don’t pay much attention to. There is no way one can find out how long it takes to rehydrate.

When one gets dehydrated, all they have to do is drink lots of water, but the duration to get hydrated again depends on various factors. When one drinks a lot of water all of a sudden, the dehydration just doesn’t disappear. When one wants to get rid of dehydration, they will certainly have to wait for a while for the water to into the system completely.

30 8 1


Test your knowledge about topics related to Health

1 / 10

What is the most common cause of a headache?

2 / 10

Food that contains sugar and starch.  Most of your energy comes from this kind of food. Foods with natural sugar or starch in them are the best source of this kind of food.

3 / 10

What is the best way to prevent the spread of germs?

4 / 10

Which organ is responsible for producing insulin in the body?

5 / 10

How many hours of sleep is recommended for an adult?

6 / 10

What is the role of carbohydrates in our diet?

7 / 10

Physical health is...

8 / 10

What is the main cause of sleep apnea?

9 / 10

What is the leading cause of death worldwide?

10 / 10

How many chambers are in the heart?

Your score is


How Long Does It Take To Rehydrate?

Type of dehydrationTime to rehydrate
Low level of dehydration1 to 2 hours
Moderate dehydration3 to 4 hours
Severe dehydration10 to 24 hours

Though the body easily metabolizes and digests water, dehydration will last for a while even after one drinks enough water. There is no way one can know how long it will take to remedy dehydration. Drinking enough water is very important for human health, because water helps the body get rid of toxins in a way, and it also helps a lot in regulating body temperature.

It will keep the muscles and bones hydrated so that they are lubricated well, it also removes toxins, keeps away infections, and makes sure the nutrients reach the cells.

The functioning of organs also depends on a good level of hydration, and drinking lots of water will improve the quality of sleep and it even elevate the mood. The body is made up of 50% to 75% of water, and dehydration happens when one doesn’t drink enough amount of water, or when the amount of water leaving the body in any way is higher than the amount of water entering the body.

Dehydration can be normal, moderate, and sometimes severe. Several symptoms let a person know if they are dehydrated. Some of the most common symptoms of moderate dehydration include thirst, dry skin, decreased urination, headaches, lightheadedness, dry mouth, and fatigue.

Why Does It Take That Long To Rehydrate?

The symptoms of severe dehydration include lack of sweating, excessive thirst, shriveling up of skin, sunken eyes, increase in heartbeat, lowering of heartbeat, and sometimes even fainting. When one experiences all these symptoms, it is time they start hydrating. There are various reasons why a person goes through dehydration, like exercising, sweating excessively, diarrhea and vomiting, fever, diabetes, urinating too much, and the most common reason of them all, not drinking enough water.

Every person experiences dehydration once in a while. When one goes through little dehydration, they can drink plenty of water and it will take about 1 to 3 hours for the body to rehydrate. It will take about 4 to 5 hours for the body to rehydrate after being moderately dehydrated, and when a person is severely dehydrated, it takes the body about 10 to 20 hours to become rehydrated again.

There are ways to prevent dehydration, and ways to remedy them. When one doesn’t treat their dehydration, it can lead to severe complications, like a decrease in blood volume, decrease in blood pressure, seizures, kidney problems which when left untreated can lead to kidney failure.


It will also lead to health problems related to increased body heat, like heat cramps, heat exhaustion, and even heat strokes. When a person doesn’t rehydrate themselves within the right time, it is better to hospitalize them, and put them on intravenous hydration, in which the fluids will be passed through the body through the veins.

The right balance of nutrients is also important, and when a person suddenly puts in a lot of water in their body after being severely dehydrated, the body will take a while to process the water and the nutrients present in it. Never over hydrate, but never let the body become dehydrated because both can be very dangerous.



Last Updated : 23 February, 2024

dot 1
One request?

I’ve put so much effort writing this blog post to provide value to you. It’ll be very helpful for me, if you consider sharing it on social media or with your friends/family. SHARING IS ♥️

Leave a Comment

Your email address will not be published. Required fields are marked *