ToolCubbyWater Intake Calculator
Estimate your daily water needs from your weight — shown in litres and in glasses.
How to use
- Enter your body weight in kilograms.
- Click Calculate to see how much water to drink in litres.
- Use the glass estimate as a practical daily target.
FAQ
How is the estimate calculated?
Weight in kg × 0.033 = litres per day. A 70 kg person: 70 × 0.033 ≈ 2.31 L or about 9 glasses.
Should I drink more when exercising?
Yes — sweat loss raises your fluid needs. Add extra water before, during and after activity.
Is more water always better?
Moderation matters. For most people matching thirst plus a steady intake is safe; consult a doctor for specific health conditions.
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More FAQs
Is this calculator free?
Yes, it is completely free with no signup and no limits.
Does it run in my browser?
Yes. Everything is calculated locally on your device — nothing is uploaded.
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