Tools

Molarity calculator

Convert between mass concentration (mg/mL) and molar concentration (mM / µM) for a reconstituted stock, using the compound's molecular weight. Works in both directions.

Molecular weight (g/mol)

Find the MW on each product’s data table or its certificate of analysis.

Concentration → molarity

Stock concentration (mg/mL)

Molarity (mM): 0.704 mM
Molarity (µM): 704.5 µM
Molarity (M): 0.0007 M

Target molarity → concentration

Target concentration (µM)

Required concentration: 0.1419 mg/mL
Equivalent: 0.1419 µg/µL

molarity (mol/L) = concentration (g/L) ÷ molecular weight (g/mol). For in-vitro research calculations only.

For in-vitro research use only

A solution-chemistry conversion between mass and molar concentration for preparing in-vitro assays. It does not advise on usage of any kind.