Normal serum potassium levels in children*

Age	Range (mEq/L or mmol/L)
Premature infant	4 to 6.5
Newborn	3.7 to 5.9
Infant	4.1 to 5.3
Child >1 year old	3.5 to 5

* Local laboratory reference ranges for normal may vary depending on laboratory and assay technique. Clinical implications of variation from normal or reference range levels must be considered individually.

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