Concentration Converter
Convert between molar units (M, mM, µM, nM) and mass-per-volume units (mg/mL, µg/mL, % w/v, ppm) using molecular weight.
Molar concentration
Working
About this tool
Convert a concentration into every common unit at once. Conversions within the molar family or within the mass-per-volume family need no extra input. Converting between the two families needs the molecular weight.
How to use it
- Enter the concentration and choose its unit.
- Enter the molecular weight if you need molar and mass units together.
- Read the full conversion table.
Formula f(x)
cmass (g/L) = c (mol/L) × M (g/mol)
1 mg/mL = 1 g/L; 1 µg/mL = 1 mg/L; 1% w/v = 1 g/100 mL = 10 g/L. ppm is treated as mg/L, which holds for dilute aqueous solutions with a density near 1 g/mL.
Worked example check your setup
1 mg/mL of GHK (M = 340.38 g/mol) is 1 g/L ÷ 340.38 g/mol = 2.938 mM = 2938 µM.