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How Much Water Should You Really Drink in a Day? You’ll Be Surprised What Doctors Suggest!

Jun 20, 2017

Did you read somewhere that you out to drink 3 to 4 litres of water every day to stay healthy and now you’re scared because you haven’t been following this? Let us allay your fears by telling you that those numbers are not always true! Speak to a professional (by that we mean a doctor and not your overly health conscious and concerned neighbour) and you’ll learn that the water intake requires of every individual is different and it varies based on several factors. These include your lifestyle, your health, your body type, physical activity and even the climate.

Having said that, you should still keep in mind that an average person needs to drink at least a few glasses of water spread over a day! Unfortunately, many of us have the bad habit of not even finishing a glass of water that we fill up. You can stay healthy by making a commitment to finish your glass of water.

Here are a few factors that dictate how much water a person should ideally drink.

Body Weight

Your weight dictates your body’s daily water requirement to a significant extent. The more your weigh, the more water you need to drink. For instance, a healthy person, weighing in at 70 kg and measuring 5 feet 10 inches would be required to drink around 2 litres of water each day.


Adult men need to drink more water than adult women, but not by much. The difference is roughly around 0.5 litres.


Age plays a role as well. A child does not need to drink more than a litre of water in a day.During teenage years, this number can go up to 1.5 litres. The need to drink water reduces after a certain age. While there’s no fixed age after which the requirement drops, you could roughly put it at over 70. However, by this age, if you’re already used to drinking a certain amount of water, you’re likely to continue doing so.


During pregnancy, a woman’s requirement for water drastically changes owing to the developing fetus. A woman will require as much pure water as an adult man or even more. That can be placed at around 2.5 litres.

Breast Feeding

Another factor that affects the water intake requirement in a woman is lactation. A mother requires plenty of water to be able to breastfeed her baby – at least 3 litres.
Apart from these physiological factors, the amount of water needed by our body largely varies depending on environmental factors and the amount of physical activity you perform.


High temperatures, combined with humidity result in excess water loss from our body, and you would be required to replenish this lost water to stay hydrated. If you live in a hot and humid area, you’ll probably need to drink 3 litres of clean water or more.

Physical Activity


The same holds good when you physically exert yourself. Along with water, you should also replenish lost minerals like potassium and sodium, which can be done by non-sugary drinking sports drinks. Children who are very active and do a lot of physical activity could end up drinking over 3 litres of water on hot and humid days.




If you’re suffering from certain health problems such as diarrhoea, your body will rapidly lose water, and this should be replaced immediately to avoid dehydration. During such condition, you should drink at least 3 litres to keep your body hydrated.
Ultimately, it’s important that you drink enough water so as to never feel thirsty. Drinking an entire day’s water at once will also not help because your body will soon excrete it. The healthy way to drink water is to spread the intake throughout the day.

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