Water Intake Calculator

How Much Water Should You Drink Per Day?

The common advice of "8 glasses a day" is a rough estimate. Your actual daily water requirement depends on your body weight, activity level, climate, and overall health. As a general rule, most health authorities recommend 35–45 ml of water per kg of body weight per day.

Factors that increase your water needs:

Hot climate: India's summer temperatures (40°C+) significantly increase water loss through sweat
Exercise: Add 400–600 ml for every hour of moderate exercise
High-protein diet: Protein metabolism requires more water for kidney processing
Illness: Fever, vomiting, and diarrhoea require increased fluid intake
Pregnancy/breastfeeding: Increases daily water requirements by 300–700 ml

Signs of Dehydration

Dark yellow urine (pale yellow = well hydrated)
Dry mouth or lips
Fatigue or low energy
Headaches
Reduced concentration
Feeling thirsty (thirst is already a sign of mild dehydration)

Frequently Asked Questions

How many litres of water should I drink per day in India?

For an average Indian adult in a hot climate, the recommendation is 2.5–3.5 litres per day — more during summer months (May–June) or with physical activity. Use this calculator to get a personalised target based on your weight and activity level.

Does tea, coffee, and juice count towards daily water intake?

Yes, all fluids — including tea, coffee, milk, juice, and soups — count towards your daily fluid intake. However, caffeinated drinks have a mild diuretic effect, so plain water should still make up the majority of your intake.

💧 Hydration Schedule (16 waking hours)

Signs of Dehydration

💡 Hydration Tips

How Much Water Should You Drink Per Day?

Signs of Dehydration

Frequently Asked Questions