Molarity calculator (C = n / V)

Molar concentration C, amount of substance n or volume V, each from the other two by C = n / V. Secondary mode: n = m / M, from the mass m and the molar mass M.

For a weighed solute, n = m / M.

C

molar concentration of the solution.

n

amount of substance, in moles.

V

volume of the solution.

m, M

mass of the solute and its molar mass (secondary mode).

Molar concentration (mol/L) only; mass concentration (g/L) is handled by the solution preparation calculator. The molar mass must be that of the form actually weighed, hydrates included.

0.5 mol of solute in 2 L of solution: C = 0.5 / 2 = 0.25 mol/L.