Water Intake Calculator
Get a personalised daily hydration target based on your weight, activity level, and climate.
Daily Water Intake Recommendation
2.94
Liters
12.4
Cups
99.4
Oz
Calculation Breakdown
💡 Hydration Tips
- • Drink water throughout the day, not all at once
- • Increase intake on exercise days
- • More water needed in hot climates
- • Monitor urine color (pale yellow = well hydrated)
- • Don't wait until you're thirsty to drink
- • Include water-rich foods (fruits, vegetables)
Formula
Daily Water = (Weight in kg × 35 ml) × (1 + Activity Factor + Climate Factor)
Base recommendation is 30-35ml per kg of body weight, adjusted for lifestyle factors.
How it works
Daily Water = (Weight in kg × 35 ml) × (1 + Activity Factor + Climate Factor) Activity Factors: Sedentary: 0 | Light: 0.3 | Moderate: 0.5 | Intense: 0.7 | Athlete: 1.0 Climate Factors: Cool: 0 | Moderate: 0.2 | Hot: 0.4 Example: 70kg person, moderate activity, moderate climate = (70 × 35) × (1 + 0.5 + 0.2) = 2,450 × 1.7 = 4.165L per day
The water intake calculator estimates your daily hydration needs based on your body weight, activity level, and climate. Enter your weight, select your typical exercise frequency, and choose your climate to get personalized hydration recommendations. Results are shown in liters, cups, and fluid ounces for easy reference.
Why this matters
Proper hydration is essential for health, affecting energy levels, cognitive function, physical performance, and metabolism. Daily water needs vary significantly based on activity level, climate, and individual factors. This calculator provides a personalized baseline to help you maintain optimal hydration.
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The complete guide to water intake calculator
Formulas, examples, and tips explained in plain English