Water Intake Calculator
Calculate how much water you should drink per day. This daily hydration calculator considers your weight, exercise activity, and local climate.
How Much Water Should I Drink?
While the "8 glasses a day" rule is popular, your actual water needs depend on your body size, activity level, and environment.
Standard Formula
Most health experts recommend drinking half an ounce to an ounce of water for each pound you weigh, every day.
Daily Oz = Body Weight (lbs) / 2
Activity Adjustment
When you exercise, you lose water through sweat. The American College of Sports Medicine suggests adding about 12 ounces (355 ml) of water for every 30 minutes of strenuous activity.
Climate Factors
Hot or humid weather makes you sweat more, increasing your fluid loss. In these conditions, it is recommended to increase your intake by roughly 10-15%.
? Frequently Asked Questions
Yes, mostly. While caffeine has a mild diuretic effect, moderate consumption of coffee and tea contributes to your total daily fluid intake.
Yes, it is possible but rare. Drinking excessive amounts of water rapidly can lead to hyponatremia (water intoxication), diluting sodium levels in the blood.
Yes! About 20% of daily fluid intake typically comes from food, especially fruits and vegetables like watermelon, cucumber, and oranges.