Water Intake Calculator

Estimate how much water you should drink per day based on weight, activity level, and climate.

Your Details

Recommended Intake

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Liters / day
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Millilitres
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Glasses (250ml)
Base (weight × 35 ml)-
Activity Add-on-
Climate Multiplier-
Total / day-
US fl oz-

General guidance only — consult a doctor if you have medical conditions that affect fluid balance.