Daily Water Intake Calculator
Baseline: approximately 0.5 oz of water per pound of body weight, adjusted for exercise and environmental factors. Based on Institute of Medicine Adequate Intake values.
Daily Water Intake
This tool is for informational purposes only and does not constitute medical advice. Consult a professional healthcare provider for personalized guidance, especially for kidney disease, heart conditions, or during pregnancy.
Adequate Intake Reference Values
| Population | Total Water AI |
|---|---|
| Men (19+) | 3.7 L (125 oz) / day |
| Women (19+) | 2.7 L (91 oz) / day |
| Pregnant women | 3.0 L (101 oz) / day |
| Breastfeeding women | 3.8 L (128 oz) / day |
Total water includes approximately 20% from food.
References & Methodology
- Institute of Medicine, National Academies (2005) — Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate. Establishes Adequate Intake (AI) for total daily water.
- American College of Sports Medicine (ACSM) — Position stand on exercise and fluid replacement: add 12 oz per 30 min of moderate exercise.
- National Kidney Foundation — Fluid intake recommendations for kidney health and stone prevention.