Water Intake Calculator

Water Intake Calculator

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you should drink ...... of water per day

This water intake calculator is designed to estimate the amount of water a person needs to consume in a day based on various factors such as age, gender, height, weight, physical activity, and climate.

The calculator works by taking into account these factors and then providing a recommended daily intake of water to help maintain proper hydration levels.

This water intake calculator helps in estimating daily water intake based on age, gender, height, weight, physical activity, and climate:

Daily Water Intake (in milliliters) = Body Weight (in kilograms) x Activity Factor x Climate Factor / 28.4


Activity Factor is a multiplier based on physical activity level, as follows:

  • Sedentary (little or no exercise) = 0.5
  • Lightly Active (light exercise or sports 1-3 days/week) = 0.6
  • Moderately Active (moderate exercise or sports 3-5 days/week) = 0.7
  • Very Active (hard exercise or sports 6-7 days/week) = 0.8
  • Extremely Active (very hard exercise or sports, physical job or training twice/day) = 1.0

Climate Factor is a multiplier based on the climate in which the person lives, as follows:

  • Hot and humid climate = 1.2
  • Moderate climate = 1.0
  • Cold and dry climate = 0.8

To calculate Body Weight in kilograms, Height must first be converted to centimeters:

  • Body Weight (in kilograms) = Height (in centimeters) – Ideal Weight (in kilograms)
  • Ideal Weight can be calculated using standard weight-for-height charts or BMI (Body Mass Index) calculators.

The recommended daily intake of water varies depending on individual needs, but the general recommendation is to consume at least 8 glasses or 2 liters of water per day. However, this may need to be adjusted based on factors such as climate, physical activity, and individual health needs.


Using a water intake calculator can help individuals determine their specific water needs and ensure that they are consuming enough water to maintain optimal health and hydration levels. But it doesn’t represent a one solution for everyone, thus consult with a doctor to get greater insight on your health issues.