Daily water intake calculator

This daily water intake calculator works out how many liters of water to drink a day based on your weight and how much you exercise.

How much water do you really need

A common guideline is about 35 ml of water per kilogram of body weight, with an extra amount added for exercise to replace fluids lost through sweat. Enter your weight and daily exercise time to get a personalized estimate, shown in liters and approximate glasses.

For guidance only — this does not replace advice from a healthcare professional.

FAQ

How is the recommended amount calculated?

As a rough estimate of about 35 ml per kilogram of body weight, plus an extra amount for each minute of daily exercise to cover the fluid lost through sweat.

Is this the same for everyone?

No. It's a general guideline — actual needs vary with climate, health conditions, pregnancy, breastfeeding and diet. It is not medical advice.

Does it include water from food and other drinks?

No, the result is for water intake specifically. Food and other beverages also contribute to your total daily fluids.