DHEA-S µg/dL → µmol/L
Convert dhea-s from µg/dL to µmol/L
Sources last checked: 2026-11-03
DHEA-S µg/dL → µmol/L
Convert dhea-s from µg/dL to µmol/L
Converts units only; reference ranges depend on the laboratory, the assay and the patient.
What is the DHEA-S µg/dL → µmol/L?
Dehydroepiandrosterone sulfate (DHEA-S) is an adrenal androgen precursor reported in µg/dL by many laboratories in Germany, Austria, Turkey and the USA, and in µmol/L in the UK and other countries using SI units. This converter multiplies by 0.02714, the factor that follows from the molar mass of DHEA sulfate (368.5 g/mol).
When to use it
- Comparing a µg/dL DHEA-S result with literature or guidelines written in µmol/L
- Work-up of hyperandrogenism, polycystic ovary syndrome or premature adrenarche using an SI-based source
- Comparing results from laboratories that report in different units
- Exam questions on adrenal androgens
When not to use it
- Unconjugated DHEA, which has a different molar mass and is a separate measurement
- Results in µg/mL — multiply by 100 first to get µg/dL (1 µg/mL = 100 µg/dL)
- Interpreting the value without age- and sex-specific reference intervals from the reporting laboratory
How it is calculated
DHEA-S (µmol/L) = DHEA-S (µg/dL) × 0.02714
Clinical pearls and limitations
- Converts units only; reference ranges depend on the laboratory, the assay and the patient.
- 1 µg/dL = 0.02714 µmol/L; conversely 1 µmol/L = 36.85 µg/dL.
- DHEA-S changes markedly with age — high in the newborn period, low in childhood, rising at adrenarche and declining steadily in adulthood — so a converted value means little without an age-matched range.
- Because DHEA-S has a long half-life and little diurnal variation, it is a more stable marker of adrenal androgen output than DHEA; sampling time matters less than for cortisol or 17-OHP.
- Some immunoassays cross-react with other sulfated steroids; LC-MS/MS steroid profiles may give different values.
Frequently asked questions
How do I convert DHEA-S from µg/dL to µmol/L?
Multiply by 0.02714. For example, 145 µg/dL × 0.02714 = 3.94 µmol/L.
Why is the DHEA-S factor 0.02714?
DHEA sulfate has a molar mass of 368.5 g/mol. 1 µg/dL is 10 µg/L, and 10 ÷ 368.5 = 0.02714 µmol/L.
Are DHEA and DHEA-S the same test?
No. DHEA is the unconjugated steroid; DHEA-S is its sulfate ester and circulates at far higher concentrations. They have different molar masses, so this factor applies only to DHEA-S.
Evidence and guidelines
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<p><a href="https://medelix.ai/en/calculators/dhea-s-ug-dl-to-umol-l">DHEA-S 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.