Water Intake Calculator

Calculate your recommended daily water intake based on weight and activity level. Stay properly hydrated for optimal health.

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Frequently Asked Questions

How much water should I drink daily?
A general guideline is 30-35 ml per kilogram of body weight. For a 70 kg adult, that is approximately 2.1-2.5 liters per day.
Can I drink too much water?
Extremely excessive water intake can cause hyponatremia (low sodium levels). However, this is rare under normal circumstances.
Do coffee and tea count toward water intake?
Yes, coffee and tea contribute to hydration. However, due to caffeine's mild diuretic effect, it is still recommended to drink plain water regularly.
Updated 2026 — WHO standards