Water Intake Calculator
Water needs vary by person and by day. This calculator is based on EFSA reference values.
Result
1.6 L from drinks/day
Total water need (including food): about 2 L.
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How it's calculated
- 1EFSA adequate intake: women 2.0 L, men 2.5 L total water (drinks + food) per day.
- 2About 80% comes from drinks and 20% from food.
- 3Add roughly 0.5 L per hour of sweaty exercise; more in hot weather.
Frequently asked questions
Do tea and coffee count?
Yes, all drinks contribute to fluid intake, though it's worth limiting sugary ones.
How do I know I'm drinking enough?
Pale yellow urine and not feeling thirsty usually mean your intake is adequate.
Can too much water be harmful?
Drinking very large amounts in a short time can rarely be dangerous. With kidney or heart disease, follow your doctor's advice.
Sources
This tool produces an estimate and is not a medical diagnosis. Talk to a doctor about health decisions.