Water Intake Calculator
Find out how much water you should drink each day with our Water Intake Calculator. Your daily hydration needs depend on your body weight, gender, activity level, climate, and whether you are pregnant or breastfeeding.
Enter your details to get a personalized recommendation for optimal hydration. The result includes both your baseline water requirement and scientifically supported adjustments for exercise, heat exposure, and physiological needs.
About Daily Water Intake
Water plays a vital role in nearly every function of the human body. It regulates temperature, supports digestion and nutrient absorption, removes waste, cushions joints, and keeps cells functioning properly. Because water is constantly lost through breathing, sweating, and urination, staying well-hydrated is essential for both physical and mental performance.
There is no single daily intake that suits everyone. Your ideal water requirement depends on your weight, gender, activity level, and climate. For women, pregnancy and breastfeeding also increase fluid needs. A commonly recommended guideline is around 35 ml of water per kilogram of body weight per day, with extra intake during exercise or hot weather.
Proper hydration supports energy levels, concentration, cardiovascular health, digestion, skin appearance, and athletic performance. Even mild dehydration may cause headaches, fatigue, dizziness, constipation, and reduced cognitive function. This calculator helps you estimate a safe and practical daily target based on your lifestyle.