Pradnya Ganorkar 
Most Indians are chronically dehydrated without knowing it. The feeling of thirst is actually a late signal by the time you feel thirsty, your body is already mildly dehydrated. In India’s climate, where temperatures frequently exceed 35 degrees Celsius for months at a time, adequate hydration is not just important for health, it is essential for basic daily functioning.
But how much water is actually enough? The answer is more nuanced than the commonly repeated rule of eight glasses per day.
The Science Behind Daily Water Requirements
The Institute of Medicine recommends a total daily water intake of approximately 3.7 litres for men and 2.7 litres for women. This includes all fluids consumed – water, chai, dal, fruits, and vegetables not just plain water. However, for most people, plain water should account for the majority of this total.
In India, the combination of heat, humidity, and physical activity means that many people need significantly more than these baseline figures. A person working in an air-conditioned office in Mumbai has very different hydration needs from a person doing manual work outdoors in Rajasthan during summer.
How to Calculate Your Personal Water Target
A practical method for calculating your individual water requirement is to use your body weight as a baseline. A commonly recommended approach is to drink 30 to 35 millilitres of water per kilogram of body weight per day under normal conditions.
For a 60 kg person: 60 x 35 = 2,100 ml or approximately 2.1 litres per day as a baseline.
For a 80 kg person: 80 x 35 = 2,800 ml or approximately 2.8 litres per day as a baseline.
Add 500 ml to this baseline for every 30 minutes of moderate exercise. Add an additional 500 ml to 1 litre during hot weather or if you spend significant time outdoors.
A practical daily water target for most Indian adults is 2.5 to 3.5 litres of plain water per day, adjusted upward for heat, exercise, and body size.
Signs You Are Not Drinking Enough Water
Urine colour is the most reliable real-time indicator of hydration status. Pale yellow urine indicates adequate hydration. Dark yellow or amber urine indicates you need to drink more water immediately. Clear urine may indicate overhydration, which is rare but possible.
Other common signs of dehydration include persistent fatigue in the afternoon, headaches without an obvious cause, difficulty concentrating, dry mouth, and constipation. Many people attribute these symptoms to other causes without realising that increasing water intake resolves them.
Does Drinking More Water Help with Weight Loss?
Yes, and the evidence is substantial. Drinking 500 ml of water approximately 30 minutes before a meal has been shown in multiple studies to reduce calorie intake at that meal by 13 percent on average. Over time, this reduction compounds meaningfully.
Additionally, mild dehydration is frequently misinterpreted by the brain as hunger. Many instances of mid-afternoon cravings that lead to unnecessary snacking are actually thirst signals. Drinking a glass of water when a craving strikes and waiting 10 minutes eliminates the craving entirely in many cases.
Staying well-hydrated also supports better physical performance during exercise, which translates to higher calorie burn from your workouts.
Best Times to Drink Water Throughout the Day
First thing in the morning: drinking 300 to 500 ml of water immediately after waking rehydrates the body after several hours without fluid and kickstarts metabolism. This is one of the easiest hydration habits to establish.
Before each meal: 500 ml of water 30 minutes before breakfast, lunch, and dinner reduces meal size and improves digestion.
Mid-morning and mid-afternoon: keeping a water bottle at your desk and drinking consistently throughout the day prevents the dehydration dip that causes afternoon fatigue.
Before and during exercise: drink 300 to 500 ml before exercise and continue drinking during any workout lasting more than 30 minutes.
Avoid drinking large amounts immediately after meals as this can dilute digestive enzymes and slow digestion. Small sips are fine but save the bulk of your water intake for between meals.
Does Chai, Coffee, and Coconut Water Count?
Chai and coffee contain caffeine, which has a mild diuretic effect meaning they cause the body to excrete slightly more fluid. However, the net hydration contribution of moderate chai or coffee consumption is still positive. Two to three cups of chai per day contributes to your total fluid intake, though plain water should remain your primary hydration source.
Coconut water is an excellent hydration choice for Indians, particularly after exercise. It contains natural electrolytes including potassium and sodium that support fluid balance better than plain water during physical activity.
Fruit juices and sweetened beverages should not be relied upon for hydration. Their sugar content means the calorie cost of the hydration they provide is disproportionately high.
How Nutrimate Tracks Your Hydration
Nutrimate includes a daily water tracking feature that lets you log each glass or bottle of water you drink throughout the day. Your hydration progress appears on the home screen alongside your nutrition and activity data, contributing to your daily health score.
The Nutrimate notification system sends smart reminders when your water intake is falling behind your daily target particularly in the morning and early afternoon when dehydration most commonly develops. This nudge system has been shown to meaningfully increase daily water intake in consistent users.
Download Nutrimate and start tracking your hydration today to build one of the simplest and most impactful health habits available.