How much water should I drink per day?

The general recommendation is about 2–3 litres (8–12 cups) per day for adults, but individual needs vary based on weight, activity level, climate, and health conditions. This calculator provides a personalised estimate.

Does coffee or tea count towards water intake?

Yes, caffeinated beverages do contribute to your daily fluid intake. However, water and herbal teas are ideal choices as they hydrate without added calories or diuretic effects at moderate consumption levels.

How does exercise affect water needs?

Physical activity increases water loss through sweat. You should drink an extra 400–600 ml (1.5–2.5 cups) per 30 minutes of exercise, more in hot or humid conditions.

Can I drink too much water?

Yes, drinking excessive water (hyponatraemia) can dilute sodium levels in the blood and be dangerous. Follow your body's thirst signals and use this calculator as a general guide, not a strict rule.

Does climate affect water intake needs?

Absolutely. Hot and humid weather increases sweat production, requiring more water. Similarly, heated indoor air in winter can cause dehydration. Adjust intake based on your environment.

Water Intake Calculator

Calculate your recommended daily water intake based on your weight, activity level, and climate.

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Calculate Your Daily Water Intake

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Gender

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How to use this tool

1

Select your preferred unit system (Imperial or Metric)

2

Enter your age and gender

3

Input your current weight

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