How do I convert Biotin from ng/L to pmol/L?

pmol/L = ng/L × 4.093. In the other direction: ng/L = pmol/L × 0.2443.

Iron & vitamins

Biotin unit converter

Biotin (biotin deficiency, laboratory interference)

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

ng/L pmol/L

10 pmol/L = 2.44 ng/L

pmol/L	pmol/L = ng/L × 4.093	ng/L = pmol/L × 0.2443

Biotin is reported in ng/L or pmol/L. The page converts between the units only.

pmol/L × 0.2443 = ng/L (exact factor 0.2443).
No established reference range is listed here; compare your result only with the range printed on your own report.

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Source: PubChem: Biotin · Last reviewed: 2026-10-19

Note from the source: No established reference range; the page converts units only. Mass-to-amount conversion uses a molar mass of 244.31 g/mol.