Worked example
To obtain 100 mL at 10 mM from a 100 mM stock, use 10 mL of stock and bring the final solution to 100 mL.
Assumptions and limitations
This assumes conservation of the same solute without reaction or loss. Target concentration cannot exceed stock concentration. The displayed diluent difference assumes additive volumes; prepare to final volume when accuracy matters.
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].