Daily Water Intake Calculator
Calculate your recommended daily water intake.
About Water Intake Calculator
Calculate your recommended daily water intake based on body weight, age, and physical activity level. Output in millilitres, litres, and standard glasses (250 mL). Includes adjustments for hot climates and exercise.
Use Cases
Setting hydration goals, tracking water intake for fitness, preventing dehydration during workouts, general health and wellness planning.
How It Works
Base recommendation: 35 mL per kg body weight. Adjusted upward for high activity (+500–1000 mL), hot climate (+500 mL), and pregnancy/breastfeeding. The 8 glasses rule is a rough average.
Frequently Asked Questions
Does coffee and tea count toward water intake?
Yes, caffeinated beverages still contribute to hydration, though pure water is ideal. Foods with high water content (fruits, vegetables) also contribute.
Can you drink too much water?
Yes. Hyponatremia (overhydration) is rare but can be dangerous. The formula provides healthy guidelines; listen to thirst signals too.