💧 Water Intake Calculator
Calculate your recommended daily water intake based on your weight, activity level, and climate. Results shown in ml, liters, glasses, and ounces.
Your Daily Water Intake
Daily Water Intake Calculator
Staying properly hydrated is essential for health. This calculator estimates your daily water needs using your body weight as a base, then adjusts for physical activity and environmental climate. The standard recommendation is approximately 35 ml per kg of body weight.
How It Works
- Base: 35 ml per kg of body weight
- Activity adjustment: Low +0%, Moderate +25%, High +50%
- Climate adjustment: Cool +0%, Moderate +10%, Hot +25%
Frequently Asked Questions
How much water should I drink per day?
A common guideline is 35 ml per kg of body weight, adjusted for activity and climate. This calculator provides a personalized estimate. The old '8 glasses a day' rule is a reasonable starting point but may not suit everyone.
Does coffee or tea count toward water intake?
Yes, moderate consumption of caffeinated beverages like coffee and tea does count toward your daily fluid intake. While caffeine is a mild diuretic, the water content in these drinks still contributes to hydration. However, water should remain your primary fluid source.
Can I drink too much water?
Yes. Drinking excessive amounts of water can lead to hyponatremia, a dangerous condition where sodium levels in the blood become too low. This is rare in healthy adults but can occur during endurance events. Listen to your body's thirst signals.
What about exercise and water intake?
During exercise, you lose water through sweat. It's recommended to drink 200–300 ml every 15–20 minutes of exercise. For intense or long-duration activities, you may also need electrolytes. The activity adjustment in this calculator provides a daily baseline that accounts for regular training.
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