About WaterDailyGoal

WaterDailyGoal is researched and maintained by an independent editorial team. We explain population water references from NAM/IOM and EFSA alongside general guidance from WHO, the NHS and Mayo Clinic. Our beverage planning formula uses site assumptions; those organisations do not validate its personal coefficients. The methodology shows the calculation and its limits. We are not medical professionals, and this tool is 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.