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Lithium unit converter

Mood stabilizer drug level (therapeutic range)

Also known as: Li, Lithium carbonate, Serum lithium, Lithémie, Litio, Litemia

Converter

Enter a value in any unit and all other units fill in.

Worked example

0.7 mmol/L (middle of the reference range) = 0.486 mg/dL

Conversion formulas

mg/dLmg/dL = mmol/L × 0.694mmol/L = mg/dL × 1.441
mg/Lmg/L = mmol/L × 6.94mmol/L = mg/L × 0.1441
µg/dLµg/dL = mmol/L × 694mmol/L = µg/dL × 0.001441
µmol/Lµmol/L = mmol/L × 1000mmol/L = µmol/L × 0.001
µg/Lµg/L = mmol/L × 6940mmol/L = µg/L × 0.0001441

Reference range

UnitAdults
mg/dL0.2776 – 0.694
mmol/L = mEq/L0.4 – 1
mg/L2.776 – 6.94
µg/dL277.6 – 694
µmol/L400 – 1000
µg/L2776 – 6940

Source: Pathology Harmony Group (ACB, IBMS, RCPath): Agreed Adult Clinical Biochemistry Reference Intervals, January 2011 · Last reviewed: 2026-10-14

Note from the source: Therapeutic range 0.4-1.0 mmol/L, 12 hours after the last dose (complies with the NPSA guidance). UK Pathology Harmony consensus of the Association for Clinical Biochemistry, the Institute of Biomedical Science and the Royal College of Pathologists.

Frequently asked questions

How do I convert Lithium from mmol/L to mg/dL?

mg/dL = mmol/L × 0.694. In the other direction: mmol/L = mg/dL × 1.441.

What is the reference range of Lithium?

For adults the range is 0.4 – 1 mmol/L (Pathology Harmony Group (ACB, IBMS, RCPath): Agreed Adult Clinical Biochemistry Reference Intervals, January 2011). Reference ranges differ between laboratories and partly by sex and age; use the range printed on your lab report.

Which units are used for Lithium?

Common units are mg/dL, mmol/L, mg/L, µg/dL, µmol/L, µg/L.

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