Water Intake Calculator
Estimate a general total-water reference and distinguish total water from beverages-only intake.
Enter or adjust the values above, then calculate.
Water Intake: daily Total Water Reference
Estimate a general total-water reference and distinguish total water from beverages-only intake.
Inputs this tool uses
- Age
- Sex used by the formula
- Activity / environment
What you get
General adult total-water reference, including water from foods and beverages.
How to use the Water Intake Calculator
- Enter age, sex used by the formula, activity / environment.
- Select any method, activity level or option shown on this page, then choose Calculate.
- Read the main result together with the supporting values, method, assumptions and limitations below before using the estimate.
How this calculation works
Water references distinguish total water from beverages alone and keep activity/environment modifiers clearly labeled.
Example calculation
The sample values loaded into the calculator produce 2.7 L/day. This example exists to show how the output is structured; replace the sample values with your own inputs for your calculation.
Assumptions and limitations
- Energy and nutrient outputs are estimates or general reference values, not individualized treatment targets.
- Adult calorie-goal tools should not be used for children, pregnancy or medical nutrition therapy unless the page explicitly supports that life stage.
Sources and review status
Source set last verified 2026-09-25. No clinician review is claimed unless a real named reviewer is displayed.
Questions people ask about Water Intake Calculator
Does the result mean I should drink that many litres of plain water?
No. The reference is total water, which includes water from foods and beverages. Individual needs vary with environment, activity, pregnancy, illness and other factors.
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