Updated
Using Water intake calculator
Compare water from drinks and food with the National Academies adult total-water reference.
The population adequate-intake reference is 3.7 L/day for adult men and 2.7 L/day for adult women, including food. It is not an individual requirement or a minimum to force yourself to drink. Needs vary with heat, activity and health. Excludes pregnancy, lactation and prescribed fluid restrictions; do not use the arithmetic gap as a treatment or drinking schedule.
A worked example
For water already consumed in drinks (ml) = 1500, estimated water from food (ml) = 700, adult reference group = Male, age (years) = 30, total water entered (ml) = 2200.
Before you use the result
The population adequate-intake reference is 3.7 L/day for adult men and 2.7 L/day for adult women, including food. It is not an individual requirement or a minimum to force yourself to drink. Needs vary with heat, activity and health. Excludes pregnancy, lactation and prescribed fluid restrictions; do not use the arithmetic gap as a treatment or drinking schedule.
Example results for water already consumed in drinks (ml)
These examples use Estimated water from food (mL): 700; Adult reference group: Male; Age (years): 30. They are reference calculations, not recommended settings.
| Water already consumed in drinks (mL) | Total water entered (mL) |
|---|---|
| 750 | 1450 |
| 1500 | 2200 |
| 3000 | 3700 |
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ToolOctopus. “Water intake calculator.” Updated 2026-09-29. https://tooloctopus.com/water-intake-calculator.
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