Normal daily fluid requirements for children based on body weight

Weight	Daily water need based on caloric expenditure
3 to ≤10 kg*	100 mL/kg
>10 to ≤20 kg	1000 mL for first 10 kg of body weight plus 50 mL/kg for any increment of weight above 10 kg
>20 to ≤80 kg	1500 mL for first 20 kg of body weight plus 20 mL/kg for any increment of weight above 20 kg
>80 kg	2700 mL/day

Under normal physiologic conditions, daily water need is equal to approximately 100 mL based on daily caloric expenditure of every 100 kcal/kg, which varies with body weight, as noted above. This daily water requirement is based on combined daily insensible and sensible water losses. Daily insensible losses from the respiratory tract and skin account for approximately 45 mL per 100 kcal of energy expended. Daily sensible water losses (urine and stool) account for approximately 55 mL per 100 kcal of energy expended.

* Infants weighing <3 kg may require lower or higher maintenance fluids, depending on their gestational and chronologic age and other medical conditions. Refer to UpToDate content on fluid and electrolyte therapy in newborns.

Graphic 121670 Version 3.0

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Normal daily fluid requirements for children based on body weight