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Water Intake Calculator
Estimate the beverage share of reference total water intake, including water supplied by food.
- Water from all beverages, L
- 2.96
- Total water from food and drinks, L
- 3.7
- Equivalent glasses of beverages
- 11.8
How the calculation works
Beverages = total water × (1 − food share/100). Reference total water: 3.7 L for men and 2.7 L for women.
Inputs
- Sex used by the equation
- Water supplied by food, %
- Glass size, mL
Calculation details
An adult estimate, not for children, pregnancy, or a personal treatment plan. Discuss results with a clinician or dietitian when managing illness or changing your diet.
These are NASEM reference levels for healthy adults, not required amounts of plain water. Heat, exercise, pregnancy, and illness change needs; follow prescribed fluid restrictions.
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Updated: 2026-10-02