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Water Intake Calculator

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

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How It Works

How daily water intake is calculated

This calculator uses a common baseline of 33 ml of water per kilogram of body weight, then adds extra for activity level: 350 ml for moderate activity, or 700 ml for high activity, reflecting additional fluid loss through sweat during exercise.

This is a general estimate, not medical advice

Actual hydration needs vary based on climate, individual health conditions, and diet (since food also contributes fluid intake). This calculator provides a general starting point, not a personalized medical recommendation.

Frequently Asked Questions

Does this include water from food?

No, this estimates fluid intake from drinking water specifically. Food, especially fruits and vegetables, also contributes meaningfully to daily hydration.

Should I drink more water in hot weather?

Yes, hot weather and increased sweating raise fluid needs beyond this baseline estimate.

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