Zinc µg/dL → µmol/L
Convert zinc from µg/dL to µmol/L
Sources last checked: 2026-11-03
Zinc µg/dL → µmol/L
Convert zinc from µg/dL to µmol/L
Converts units only; reference ranges depend on the laboratory, the assay and the patient.
What is the Zinc µg/dL → µmol/L?
Serum or plasma zinc is reported in µg/dL in the USA, Turkey and by some European laboratories, and in µmol/L in the UK and in SI-based literature. This converter multiplies by 0.1529, the factor that follows from the atomic mass of zinc (65.4 g/mol). Most circulating zinc is bound to albumin, so the concentration reflects protein status and the acute-phase response as well as zinc supply.
When to use it
- Comparing a µg/dL result with SI-based nutrition or parenteral-nutrition literature
- Reading UK or Scandinavian reports and papers
- Comparing serial values from laboratories with different units
When not to use it
- Zinc protoporphyrin, a different analyte used in iron and lead assessment
- Judging body zinc stores from a single value during acute illness, when inflammation lowers serum zinc independently of stores
- Urine or hair zinc
How it is calculated
Zinc (µmol/L) = zinc (µg/dL) × 0.1529
Clinical pearls and limitations
- Converts units only; reference ranges depend on the laboratory, the assay and the patient.
- 1 µg/dL ≈ 0.153 µmol/L; 100 µg/dL ≈ 15.3 µmol/L.
- Zinc falls with hypoalbuminaemia, during the acute-phase response and after meals, and it varies over the day — a fasting morning sample is easier to interpret.
- Haemolysis releases red-cell zinc, and tubes or stoppers can add zinc; both falsely raise the result.
- Serum and plasma values from the same person can differ slightly, so the reference interval must match the matrix the laboratory uses.
Frequently asked questions
How do I convert zinc from µg/dL to µmol/L?
Multiply by 0.1529. For example, 80 µg/dL × 0.1529 = 12.2 µmol/L and 110 µg/dL × 0.1529 = 16.8 µmol/L.
Where does the factor 0.1529 come from?
Zinc has an atomic mass of 65.4 g/mol. 1 µg/dL is 10 µg/L, and 10 ÷ 65.4 = 0.1529 µmol/L.
Why can serum zinc be low in acute illness without true deficiency?
During inflammation zinc shifts from plasma into the liver and other tissues, and low albumin reduces the bound fraction. A low value in that setting is hard to interpret without considering CRP and albumin or repeating the test after recovery.
Evidence and guidelines
Have a follow-up question?
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<p><a href="https://medelix.ai/en/calculators/zinc-ug-dl-to-umol-l">Zinc µg/dL → µmol/L calculator by Medelix</a></p>For healthcare professionals and medical students. These tools support, and do not replace, clinical judgement. Always check results against the original source and your local protocols.