Does coffee and tea count toward daily water intake?

Yes, coffee and tea do contribute to hydration despite being mild diuretics. However, water, herbal teas, and fruits/vegetables with high water content are the best sources of hydration.

How do I know if I am drinking enough water?

The easiest way is to check urine color. Pale yellow (like lemonade) means well-hydrated. Dark yellow or amber means you need more water. Clear urine means you may be overhydrated.

💧 Health Calculator

Water Intake Calculator

Find your exact daily water requirement based on your weight, activity level and climate. Get a personalized hourly hydration schedule.

Units:

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💧 Daily water requirement -- L

--Glasses (250ml)

--Bottles (500ml)

--Millilitres

⏰ Hourly hydration schedule

🌈 Urine colour hydration guide

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💡 Personalized hydration tips

How is daily water intake calculated?

The standard formula is 35ml per kg of body weight as a base. This is then adjusted for activity level, climate, gender and age. Pregnant women need an additional 300ml/day and breastfeeding women need 700ml/day extra.

💧 35ml/kg base rule

The most accepted formula: daily water = body weight (kg) × 35ml. A 60kg person needs 2.1L base. This increases with exercise, heat, and sweat loss.

☀️ Heat adjustment

In hot climates (Mumbai, Chennai, Hyderabad summer), you can lose 0.5–1L extra per hour through sweating. Always carry a water bottle outdoors in summer.

🏋️ Exercise adjustment

Add 500ml for every 30 minutes of moderate exercise, and up to 1L per hour for intense workouts. Drink during and after exercise, not just before.

☕ Tea & coffee

Coffee and tea do count toward hydration. However, alcohol is dehydrating. Fruits and vegetables contribute 20-30% of daily fluid needs through their water content.

Frequently asked questions

How much water should I drink per day?

The standard recommendation is 35ml per kg of body weight. A 70kg person needs about 2.45 litres daily. This increases with exercise (add 500ml per 30 min workout), hot weather (add 0.3–0.7L), and special conditions like pregnancy (+300ml) or breastfeeding (+700ml).

Does the 8 glasses of water per day rule work?

The "8×8" rule (eight 8-ounce glasses = 1.9L) is a reasonable starting point but not scientifically precise. Individual needs vary widely based on body weight, activity, climate, and diet. Using the weight-based formula (35ml/kg) gives a more accurate personal recommendation.

What are signs of dehydration?

Early signs: thirst, dark urine (amber/yellow), dry mouth, fatigue, headache. Moderate dehydration: dizziness, reduced urine output, dry skin, confusion. Dark urine is the most reliable early indicator — aim for pale yellow (like lemonade).

Can I drink too much water?

Yes — overhydration (hyponatremia) is rare but possible if you drink excessively (more than 1 litre per hour). It dilutes sodium in your blood and can cause nausea, headaches, and in extreme cases, seizures. For most people, thirst is a reliable guide.