Water Intake Calculator
Find out how many litres of water to drink per day based on weight and activity.
How to use
- 1Enter your weight (kg).
- 2See the recommended daily amount.
About
Calculates the recommended daily water intake based on weight, an estimate to support hydration.
How to calculate daily water intake
UtilNexo's calculator estimates how much water you should drink per day based on body weight, a simple reference for hydration.
The most common rule suggests about 35 ml of water per kilogram of body weight per day. A 70 kg person, for example, would have a target of about 2.45 liters daily.
The real need varies with climate, physical activity, diet, and health conditions. The tool offers a starting point, not a rigid rule.
Examples
- 70 kg → about 2.45 liters per day.
- 85 kg → about 2.98 liters per day.
Limitations
- The value is a generic estimate; athletes and people in hot climates may need more.
- This calculation is informational and does not replace medical or nutritionist guidance.
How to use the water intake calculator
- 1Enter your weight.
- 2See the estimated daily water target.
Frequently asked questions
How many ml per kilo should I drink?
The common reference is about 35 ml per kilo per day, but the ideal varies from person to person.
Does physical exercise change the need?
Yes. Those who sweat a lot need extra fluids beyond the base estimate.
Can I count other liquids?
Water, teas, and water-rich foods contribute to hydration, but plain water is the main reference.
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