Water Intake Calculator
Calculate your recommended daily water intake based on body weight.
2.3
Liters/day
9.8
Cups/day
How This Works
This uses a common baseline of 33ml of water per kilogram of body weight. Actual needs vary with climate, activity level, and overall health — increase intake in hot weather or during exercise, and check with a doctor if you have a condition affecting fluid balance.
Formula
Water (liters) = Weight (kg) × 0.033
Frequently Asked Questions
How much water should I drink if I weigh 70kg?
Approximately 2.3 liters (9.8 cups) per day as a general baseline.
Does this account for exercise or hot weather?
No — this is a resting baseline. Add roughly 350-700ml for every 30 minutes of exercise, and more in hot or humid conditions.