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Water Intake Calculator

Calculate Your Daily Hydration Needs

Weight (kg)

Age

Activity Level

Climate

Water Intake Formula

Base: 35ml per kg body weight

Adjusted for activity and climate

Activity multiplier: 1.0-1.6

Staying hydrated supports energy, concentration, and overall health.

⚠ Individual needs vary. Consult healthcare provider for personalized hydration goals.

What Is Water Intake?

Water intake refers to the amount of water you consume daily to maintain proper hydration. Water is essential for digestion, temperature regulation, nutrient absorption, and brain function.

Benefits

Improved energy, better concentration, healthier skin, proper digestion.

Signs of Good Hydration

Clear/light urine, normal thirst, consistent energy levels.

Overhydration

Rare but possible. Hyponatremia occurs when sodium levels drop too low.

Water Sources

Water, herbal tea, fruits, vegetables all contribute to hydration.

Teaching Example: 70kg, light activity, temperate climate. Base=70×35=2450ml. With activity adjustment = ~2800-3000ml/day.

Applications

Daily Hydration Fitness Goals Weight Management Health Tracking Workplace Wellness

Frequently Asked Questions

How much water should I drink?▼

General rule: 8 glasses (64oz) daily. More accurate: 35ml per kg of body weight. Active people need more.

Does activity level affect water needs?▼

Yes. Exercise increases water loss through sweat. Add 250-500ml per 30min of exercise.

Does climate matter?▼

Yes. Hot/humid climates increase water loss. Drink more in summer or hot environments.

Signs of dehydration?▼

Thirst, dark urine, fatigue, headache, dry skin. Severe: dizziness, rapid heartbeat, confusion.

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