Last updated: April 28, 2026
⚠️ The information provided by HydroCalc is for general wellness guidance only. It is not medical advice and should not be used as a substitute for professional medical consultation, diagnosis, or treatment.
1. Medical Disclaimer
HydroCalc ("the Site") provides general wellness information and hydration estimates based on widely referenced formulas and guidelines. Nothing on this Site constitutes medical advice, and no professional medical relationship is established between you and HydroCalc by using this Site.
You should always seek the advice of a qualified physician, registered dietitian, or other qualified healthcare professional before:
- Making significant changes to your fluid intake or diet.
- Using this calculator if you have a medical condition that affects fluid balance (such as kidney disease, heart failure, diabetes insipidus, or hyponatraemia).
- Using calculator results to guide hydration during medical treatment, surgery, or recovery.
- Applying results to infants, young children, or elderly individuals with specific healthcare needs.
2. Accuracy of Results
The water intake figures produced by our calculator are estimates. They are based on general population formulas and adjustment factors derived from wellness guidelines. Individual hydration needs vary significantly due to factors that our calculator cannot account for, including:
- Specific medical conditions and medications
- Kidney function and metabolic rate
- Acute illness, fever, or infection
- Exact exercise duration, intensity, and sweat rate
- Detailed dietary fluid intake from food and non-water beverages
We make no warranty that the results are accurate, complete, or appropriate for your specific health circumstances.
3. No Professional Relationship
Using this Site does not create a doctor-patient, dietitian-client, or any other professional healthcare relationship. The Site and its tools are not a substitute for professional medical advice, examination, diagnosis, or treatment.
4. Formula Disclaimer
Our baseline formula (Body Weight × 33ml) is aligned with general IOM wellness guidelines and is widely used in non-medical contexts. It is not a clinically prescribed formula and has not been validated for use in medical settings. Always defer to guidance from your healthcare provider over any output from this calculator.
5. External Links Disclaimer
This Site includes links to external resources such as the National Academies of Sciences and the World Health Organization. These links are provided for reference only. HydroCalc does not endorse, control, or guarantee the accuracy of content on any external site. We are not responsible for the content or privacy practices of linked third-party websites.
6. Affiliate Disclaimer
HydroCalc does not currently use affiliate links. If this changes in the future, affected pages will carry a clear disclosure notice.
7. Limitation of Liability
To the maximum extent permitted by applicable law, HydroCalc shall not be held liable for any harm, loss, or adverse health outcome arising directly or indirectly from reliance on any content, tool output, or information provided on this Site.
8. Questions
If you have any questions about this Disclaimer, please contact us.