Mixing Solutions Calculator

About this calculator

When two solutions of different volumes and concentrations are combined, the total amount of solute is conserved even though the concentration changes — the principle behind the classic C1V1 + C2V2 = C3V3 mixing equation, where C3 is the final blended concentration and V3 is the sum of the two volumes. This is the same logic used in reverse for dilution (adding pure solvent, C2 = 0) and in alligation problems for blending two stock solutions to hit a target strength.

Chemists, pharmacists and lab technicians rely on this constantly — diluting a stock reagent to a working concentration, blending two batches of a solution with slightly different strengths, or preparing a solution of exact molarity from two available stocks. This calculator takes the volume and concentration of each input solution and returns the concentration of the resulting mixture.