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Water Requirement Calculator


Water requirement calculator determines the daily amount of water required by the body of a person.


Water Requirement Calculator
Enter age in months: months
Enter weight in kg: kg


The approximate daily water requirement calculations are based on the following estimations:

Based on age:

Neonates: 120 mL/kg/day (from 120 to 180 mL/kg/day)

1 to 12 months: 150 mL/kg/day (maximum 200 mL)

Based on weight:

< 10 kg: 100 mL/kg/day

10 to 20 kg: 1000 mL + (50 mL/kg/day for weight over 10 kg)

> 20 kg: 1500 mL + (20 mL/kg/day for weight over 20 kg)



Copyright © 2007-2016 Drug Information, LLC.

Legal Notices and Disclaimer

All calculator information provided by the is for educational purposes only. This information should not be used for the diagnosis or treatment of any health problem or disease and IS NOT INTENDED TO REPLACE CLINICAL JUDGMENT OR GUIDE INDIVIDUAL PATIENT CARE IN ANY MANNER.

Rev 06/16