In children, urine output is most adequately assessed by stating the amount of urine produced per hour over a designated period of time. ( Adults can usually just be reported as mL/hr as the difference in body weight among adults does not vary as greatly as a percentage as it does in children)

Urine output in mL/kg/hr =

(Total Urine Output/Weight in Kg)/# of hours

Minimum acceptable output:

Adult: 0.5-1.0 mL/kg/hr

Child: 1.0-2.0 mL/kg/hr

Thanks to:

Eric Mansell

University of Florida

College of Medicine