Magnesium (Mg2+) fulfills various functions in the human body. Complications associated with decreased Mg levels are neuromuscular irritability and cardiac symptoms. Elevated magnesium values can be observed e.g. in dehydration or renal disorders.

Reference Ranges

Serum / Plasma
Women1.9 – 2.5 mg/dL0.77 – 1.03 mmol/L
Men1.8 – 2.6 mg/dL0.73 – 1.06 mmol/L
Neonates1.2 – 2.6 mg/dL0.48 – 1.05 mmol/L
Children1.5 – 2.3 mg/dL0.60 – 0.95 mmol/L
Neonates, Children, Adults73 – 122 mg/24h3 – 5 mmol/24h
Neonates, Children, Adults2.1 – 3.3 mg/dL0.85 – 1.35 mmol/L
Each laboratory should check if the reference ranges are transferable to its own patient population and determine own reference ranges if necessary. For diagnostic purposes, the results should always be assessed with the patient’s medical history, clinical examinations and other findings.

For information on clinical relevance, please refer to the package insert.


Use our conversion tool to quickly convert between conventional units and SI units



< All Reference Ranges