Worked example
10 ng/mL of a 50 kDa molecule is 0.2 nM. A 50 kDa molar mass is entered as 50 kDa or 50,000 g/mol.
Assumptions and limitations
Use the molar mass of the exact molecular species. A mass concentration alone cannot determine molarity. This converter does not identify the molecule or infer its molar mass.
For educational and informational use. Not for patient care or safety-critical decisions. Check the relevant protocol and qualified guidance.
Reference and calculation checks
OpenStax Chemistry 2e: Molarity. The reference explains the underlying method; it does not endorse Toollinks.
Implementation checked October 19, 2026 using automated examples, unit conversion checks, and invalid-input checks. These checks do not certify a laboratory protocol. Read our calculation standards or report a reproducible issue to [email protected].