Daily Water Intake Calculator
Estimate how much water you should drink each day based on your body weight and activity level.
Your daily goal
About daily water needs
A common guideline is about 30–35 ml of water per kilogram of body weight per day, increased for hot weather or exercise. This covers fluids from both drinks and food.
Individual needs vary with climate, pregnancy, breastfeeding and health conditions. Drink when thirsty and check that your urine is pale yellow — a simple sign of good hydration.
Water intake calculator FAQ
How is my water intake calculated?
Using roughly 30 ml (low activity), 35 ml (moderate) or 40 ml (high activity) per kilogram of body weight per day — a widely used guideline.
Does coffee or tea count?
Yes, caffeinated drinks still contribute to your daily fluid intake, though plain water is the best choice. Foods like fruit and soup count too.
Should I drink more during pregnancy?
Yes — pregnant and breastfeeding women need more fluids. Follow your doctor's advice, as individual needs vary.