Water Intake Calculator

Calculate your recommended daily water intake based on your weight and activity level.

✓ Free to use ✓ Instant results ✓ Mobile friendly ✓ No sign-up needed

Weight (kg)

Activity Level

Daily Water

Glasses (250ml)

With Exercise Add

💧 Stay hydrated all day

Why Hydration Matters

Water regulates body temperature, transports nutrients and supports every bodily function. Dehydration impairs performance and cognition.

Is 8 glasses a day the right amount?+

The 8×8 rule is a rough guide. Actual needs depend on your weight, activity, climate and diet.

Does coffee count towards water intake?+

Coffee is mildly diuretic but still contributes to hydration. Plain water is always best.

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