Water Intake Calculator
Estimate a general daily water intake target based on your body weight.
Disclaimer: This result is an estimate for informational purposes only and is not medical advice.
Calculate
Enter your values below.
Result
Estimated daily water intake
0
Disclaimer: This result is an estimate for informational purposes only and is not medical advice.
Formula used
Water intake (liters) = Weight (kg) × 0.035
Example: 70 kg → estimated water intake ≈ 2.45 liters/day.
How to use this calculator
- Enter Weight (kg).
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
Where does the 0.035 L/kg figure come from?
It's a commonly cited general estimate (roughly 35 mL per kg of body weight) — individual needs vary by climate, activity, and health.
Does this include water from food?
No, this is a rough total fluid target — a meaningful portion of daily water intake also comes from food in a typical diet.
Should I drink more if I exercise?
Generally yes, increased activity and sweating raise fluid needs — this is only a baseline estimate.
Is more water always better?
No, excessive water intake can also be harmful — moderate, consistent hydration aligned with your needs is the general goal.