1
Enter Weight
Input your body weight for calculation.
Water Intake Calculator
Calculate your daily water needs
Pro Tip
Hydration needs vary by climate, activity, and individual. Urine color is best indicator: pale yellow means hydrated, dark yellow means drink more.
How to Use the Water Intake Calculator
2
Set Activity Level
Choose activity intensity and duration.
3
Get Recommendation
Receive personalized daily water intake goal.
Hydration Science
Water is essential for every bodily function. General guideline is half your weight in ounces, adjusted for activity, climate, and individual factors.
Frequently Asked Questions
General rule: half your body weight in ounces. 150lb person needs ~75oz (9 cups). Adjust for exercise and climate.
Yes, overhydration (hyponatremia) is dangerous but rare. Trust thirst signals and monitor urine color instead of forcing excessive water.