Water Intake Calculator

This Water Intake Calculator helps you estimate how much water you should drink per day based on your body weight, activity level, and environmental conditions.

Water needs increase with physical activity and hot climates.

Daily Water Intake

Total Water
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In Glasses (250 ml)
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Why Water Intake Is Important

Water is essential for nearly every bodily function, including temperature regulation, nutrient transport, digestion, and waste removal. Staying adequately hydrated supports both physical and mental performance.

How Daily Water Intake Is Calculated

This calculator estimates daily water needs based on body weight using a general guideline of 30–35 ml per kilogram of body weight, with adjustments for physical activity and climate.

Factors That Affect Water Requirements

  • Body weight and composition
  • Physical activity and exercise
  • Climate and environmental temperature
  • Overall health and diet

Benefits of Proper Hydration

  • Improves energy levels and focus
  • Supports metabolism and digestion
  • Helps regulate body temperature
  • Supports skin and joint health

Frequently Asked Questions

Most adults need between 2 and 3 liters of water per day, depending on body weight, activity level, and climate.
Yes. Physical activity increases fluid loss through sweat, requiring additional water intake to stay hydrated.
Excessive water intake in a short period can be harmful, but this is rare. Drinking according to thirst and daily needs is generally safe.
Yes. Water, tea, milk, and other beverages contribute to hydration, though plain water is the best choice.