HydrationMap is an independent hydration research and information platform built to make science-based hydration guidance accessible to everyone — regardless of where they live or what they do.
We believe “drink 8 glasses a day” is outdated advice. Your actual water needs depend on dozens of factors: the temperature and humidity where you are right now, your body weight, activity level, age, and even your caffeine intake. HydrationMap was built to reflect that complexity.
We monitor real-time weather conditions across 500+ cities worldwide and combine that data with established physiological research to generate personalized daily hydration recommendations. Our global hydration map updates hourly, so the guidance you see today reflects today's conditions — not last month's averages.
Our editorial team produces in-depth guides on hydration science, cross-referenced against peer-reviewed literature from sources including the National Institutes of Health, the Mayo Clinic, and published sports medicine research.
Our hydration calculations are grounded in the Galvez equation and adjusted for 12+ physiological and environmental variables, including ambient temperature and humidity, elevation and UV index, body weight and age, activity level, caffeine and alcohol consumption, and illness factors.
A full explanation is available on our Methodology page.
HydrationMap does not provide medical advice. If you have a health condition affecting your fluid intake, please consult a qualified healthcare provider. See our Medical Disclaimer.
HydrationMap was founded in 2023 by a small team with backgrounds in data engineering, health informatics, and digital publishing. We are an independent, privately operated platform with no pharmaceutical or supplement industry affiliations.
We do not sell supplements, endorse specific products, or accept sponsored content that influences our editorial output.
Editorial questions and corrections: support@hydrationmap.com
Business and advertising inquiries: sales@hydrationmap.com