About WaterDailyGoal

WaterDailyGoal is researched and maintained by an independent editorial team. We translate everyday-hydration guidance from the U.S. National Academies (NAM/IOM), EFSA, the World Health Organization, the NHS, and the Mayo Clinic into a clear, personal number — and show our working on the methodology page. We are not medical professionals, and this is a friendly wellness utility, not medical advice.

Why this exists

Most hydration advice is either a vague “drink 8 glasses” rule or a wall of medical text with no actual number. We wanted the opposite: a tool that takes your weight, activity, and climate and gives you a clear, honest target in seconds — then explains the maths instead of hiding it.

Our principles

• Honest, not medical. We give friendly estimates for healthy adults and point you to professionals for anything clinical.
• Transparent. The formula and sources are public. We cite the U.S. National Academies, EFSA, and the Mayo Clinic — and tell you when the science is uncertain.
• Privacy-conscious & free. No signup or account. Calculator inputs are not stored on our servers, and our analytics are explained in the privacy policy.
• Useful over flashy.Every page should answer a real question better than the alternatives, or it doesn't ship.