Daily Water Intake Calculator
Estimate your recommended daily water intake based on weight, activity level, and climate.
Published by:
isCalculator Editorial Team
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How to use this tool?
Use the Daily Water Intake Calculator to estimate your recommended water consumption based on your weight, activity level, and climate.
- Enter your weight in kilograms (e.g., 70). Only metric units are supported.
- Select your activity level from the dropdown (Sedentary to Extra active).
- Choose your climate (Cool/Temperate or Hot/Humid).
- Click "Calculate" to see your result in liters (L).
The result is based on the formula: Weight (kg) × 0.033 × Activity Factor × Climate Factor. A value of 2.5 L means you should drink about 2.5 liters of water daily.
Previous Results
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Frequently Asked Questions
We use a base of 33 ml per kg of body weight, then multiply by activity and climate factors. For example, a 70 kg person with moderate activity in a temperate climate needs about 70 × 0.033 × 1.4 × 1.0 = 3.23 L.
Sedentary: little or no exercise. Lightly active: 1-3 days/week. Moderately active: 3-5 days/week. Very active: 6-7 days/week. Extra active: intense daily exercise.
Yes, hot or humid climates increase sweat loss, so we add a 10% multiplier to account for higher fluid requirements.
