Water Intake Calculator

Daily Hydration Needs Based on Weight, Activity & Climate

Water = Weight × 35ml + Exercise + Climate + Special

📖 How to Use This Water Intake Calculator

Enter your weight, age, gender, exercise minutes, climate, and special conditions to get your personalized daily water recommendation.

💧 Why Hydration Matters

Water is essential for every bodily function. Proper hydration helps regulate body temperature, transport nutrients, lubricate joints, flush out waste, and maintain cognitive function. Even mild dehydration (1-2% body weight loss) can impair concentration, mood, and physical performance.

📊 Water Intake Formula

Base: 35 ml per kg body weight
Exercise: +500 ml per 30 min exercise
Hot Climate: +500 ml | Cold: -200 ml
Pregnancy: +300 ml | Breastfeeding: +700 ml

💡 Signs of Dehydration

🥤 Best Hydration Sources

❓ Frequently Asked Questions

How much water should I drink daily? ▼
General recommendation: 8-10 cups (2-2.5L) for women, 10-12 cups (2.5-3L) for men. Use this calculator for personalized needs.
Does coffee count toward water intake? ▼
Yes! Moderate caffeine (1-3 cups) still contributes to hydration. The water content outweighs the mild diuretic effect.
Can drinking water help with weight loss? ▼
Yes! Drinking water before meals increases satiety, boosts metabolism by 24-30%, and replaces high-calorie beverages.
Is it possible to drink too much water? ▼
Yes, though rare. Overhydration (hyponatremia) dilutes sodium levels. Follow thirst and calculator recommendations.
How does exercise affect water needs? ▼
Add 400-600 ml for every 30 minutes of moderate exercise. For intense exercise over 1 hour, consider electrolytes.