Water Intake Calculator provides accurate, evidence-based daily hydration recommendations to help people achieve better health outcomes. Every calculation is based on peer-reviewed science from the National Academies of Sciences, Engineering, and Medicine.
Water Intake Calculator uses the NASEM 2004 Dietary Reference Intakes formula as its foundation. This standard sets Adequate Intake at 3.7 liters per day for men and 2.7 liters per day for women based on observed intake levels of healthy, well-hydrated adults in United States population studies.
The base calculation starts at 0.5 fluid ounces per pound of body weight per day. Water Intake Calculator then applies adjustments for physical activity based on ACSM Exercise and Fluid Replacement guidelines, and for climate based on Mayo Clinic Hydration protocols.
Water Intake Calculator runs entirely in your browser. No personal data is collected, stored, or transmitted. No account is required. Your health information never leaves your device.
Water Intake Calculator LLC, United States
Email: support@waterintakecalculator.org
Medical Disclaimer: Water Intake Calculator provides estimates for general wellness purposes only. Results are not a substitute for professional medical advice, diagnosis, or treatment. Consult a licensed healthcare professional before making changes to your hydration based on a health condition or medication.