Aldosterone ng/dL → pmol/L
Convert aldosterone from ng/dL to pmol/L
Sources last checked: 2026-11-03
Aldosterone ng/dL → pmol/L
Convert aldosterone from ng/dL to pmol/L
Converts units only; reference ranges depend on the laboratory, the assay and the patient.
What is the Aldosterone ng/dL → pmol/L?
Plasma or serum aldosterone is reported in ng/dL in much of the US literature, in pmol/L in the UK and many SI-based European publications, and in pg/mL or ng/L by many laboratories in German-speaking countries. This converter turns ng/dL into pmol/L by multiplying by 27.75, the factor that follows from the molar mass of aldosterone (360.4 g/mol). It converts the aldosterone concentration only, not the renin value or the ratio built from both.
When to use it
- Comparing an aldosterone result in ng/dL with a European guideline, protocol or paper written in pmol/L
- Preparing both components of an aldosterone/renin ratio in the units a source uses before calculating the ratio
- Reading saline infusion, captopril or fludrocortisone suppression test results against an SI-based source
- Exam questions on primary aldosteronism
When not to use it
- Values in pg/mL or ng/L — divide by 10 first to get ng/dL (1 ng/dL = 10 pg/mL = 10 ng/L)
- Converting an aldosterone/renin ratio as a single number: the renin part has its own units and must be handled separately
- Urinary aldosterone reported per 24 h, which is an amount rather than a concentration
How it is calculated
Aldosterone (pmol/L) = aldosterone (ng/dL) × 27.75
Clinical pearls and limitations
- Converts units only; reference ranges depend on the laboratory, the assay and the patient.
- 1 ng/dL = 27.75 pmol/L; conversely 1 pmol/L = 0.03604 ng/dL.
- Aldosterone/renin ratios are only comparable if both parts use the same units: aldosterone in ng/dL or pmol/L, and renin either as plasma renin activity or as direct renin concentration, which are not interchangeable.
- Mineralocorticoid receptor antagonists, diuretics, ACE inhibitors, ARBs, beta-blockers, hypokalaemia, posture and time of day all shift aldosterone and renin; screening protocols specify how to prepare the patient.
- Immunoassays and LC-MS/MS can give systematically different aldosterone values, so a threshold validated on one method may not transfer to another even after exact unit conversion.
Frequently asked questions
How do I convert aldosterone from ng/dL to pmol/L?
Multiply by 27.75. For example, 9.6 ng/dL × 27.75 = 266 pmol/L and 4.3 ng/dL × 27.75 = 119 pmol/L.
Why is the aldosterone factor 27.75?
Aldosterone has a molar mass of 360.4 g/mol. 1 ng/dL is 10 ng/L, and 10 ÷ 360.4 = 0.02775 nmol/L, which is 27.75 pmol/L.
Can I compare my aldosterone/renin ratio with a cut-off from another country?
Only after converting both aldosterone and renin into the units the source used and checking whether it measured renin activity or renin concentration. Ratio thresholds also depend on the assay and the guideline.
Evidence and guidelines
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<p><a href="https://medelix.ai/en/calculators/aldosterone-ng-dl-to-pmol-l">Aldosterone ng/dL → pmol/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.