Calculate your personalized daily hydration needs & track with visual glass counter
Water makes up about 60% of your body weight and is essential for every cell, tissue, and organ. Our Water Intake Calculator considers your weight, age, gender, activity level, climate, and health conditions to give you a personalized daily hydration target.
Body Weight
The general rule is 30-35 ml per kg of body weight. A 70 kg person needs approximately 2.1-2.5 liters of water daily as a baseline, before adjusting for other factors.
Physical Activity
Exercise increases water loss through sweat. Add 350-700 ml for every hour of moderate to intense exercise. Very active individuals may need 3-4+ liters per day.
Climate & Temperature
Hot and humid weather increases perspiration. In Indian summers (35-45°C), you may need 500 ml to 1.5 liters more than in winter. Always increase intake during heat waves.
Health Conditions
Pregnancy requires +300-500 ml/day. Breastfeeding requires +700-1000 ml/day. Fever increases needs by 500+ ml/day. Those with kidney or heart conditions should consult a doctor.
Watch Out For These Symptoms
Dark yellow urine, dry mouth, fatigue, headache, dizziness, dry skin, constipation, and decreased urination frequency. Severe dehydration can cause rapid heartbeat, confusion, and fainting — seek medical help immediately.
Practical Hydration Strategies
Start your day with a glass of water. Keep a water bottle at your desk. Drink before, during, and after exercise. Eat water-rich foods (cucumber, watermelon, oranges). Set hourly reminders. Limit excessive caffeine and alcohol as they are diuretics.
Can I drink too much water?
Yes — overhydration (hyponatremia) is rare but dangerous. Drinking more than 1 liter per hour can dilute blood sodium levels. Stick to your calculated target and spread intake throughout the day.
Does tea or coffee count toward my water intake?
Yes, but with caution. While they contribute to fluid intake, caffeine has a mild diuretic effect. Herbal teas and decaf coffee are better hydrators. Water remains the best choice.
How do I know if I'm drinking enough?
Check your urine color — pale yellow or straw-colored means you're well-hydrated. Dark yellow or amber indicates you need more water. You should also urinate 6-8 times per day.
Should I drink water before or after meals?
Drink water 30 minutes before meals to aid digestion, but avoid drinking large amounts immediately before or during meals as it can dilute stomach acids. Small sips during meals are fine.
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