Water Intake Reference Online

Your measurements

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Educational estimates, with their equations and assumptions. They do not diagnose a condition or prescribe a treatment.

Method, assumptions & sources

Who this is for

Generally healthy adults aged 20 or older, outside pregnancy and breastfeeding, in ordinary conditions.

How it works

National Academies adult Adequate Intake reference: female total water 2.7 L/day, male 3.7 L/day. Approximate beverage shares are 2.2 and 3.0 L/day. These are population reference values; no unsupported body-weight or fixed exercise multiplier is applied.

Keep in mind

Total water includes food and all beverages, not an extra plain-water target.
Activity, heat and illness change needs. Fluid restrictions and kidney/heart conditions require individualized guidance; excessive water can be harmful.

Sources

National Academies: total-water Adequate Intake, including food (opens in a new tab)