Water Intake Calculator
How much water you need depends mostly on your body weight and how active you are. This free calculator gives you a personalised daily target in litres and glasses.
Open the Water Intake CalculatorHow to use the Water Intake Calculator
- 1Enter your body weight.
- 2Set your activity level for the day.
- 3Read your recommended daily water intake.
How it is calculated
A common estimate is roughly 30–35 ml of water per kilogram of body weight, increased for exercise, heat, and high activity. Individual needs vary with climate, health conditions, and diet.
Go beyond a single number
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FAQ
Water Intake Calculator — FAQs
This calculator is for general information and education only and is not a substitute for professional medical advice, diagnosis, or treatment.