Solution Mixing Calculator

Enter two solution concentrations and your target concentration and volume; the calculator tells you exactly how much of each to mix.

Use the Solution Mixing Calculator

Mix Two Solutions

C1V1 + C2V2 = CfVf

Solution 1

M

Solution 2 (can be 0 for pure diluent)

M
M

Fill in the values on the left and click Calculate to see results.

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Summary

This tool solves the two-solution mixing equation C1V1 + C2V2 = Cf·Vf for the volumes V1 and V2 you need to combine. Enter the concentration of each stock solution, choose your target concentration and final volume, and get the answer instantly. Works with molarity (M), mass/volume percent (%), and parts per million (ppm).

How it works

  1. Enter the concentration of Solution 1 (the first stock).
  2. Enter the concentration of Solution 2 (the second stock or diluent).
  3. Set the desired final concentration and total final volume.
  4. Choose a unit — molarity (M), percent (%), or ppm — applied consistently to all fields.
  5. Click Calculate. The tool solves C1V1 + C2V2 = Cf·Vf for V1 and V2.
  6. Results show the volume of each solution to measure out and a verification of the mixed concentration.

Use cases

  • Prepare a working buffer from two stock solutions in a lab.
  • Dilute a concentrated reagent by mixing it with a diluent at a known concentration.
  • Calculate how to blend two saline solutions to reach a clinical target concentration.
  • Mix two fertilizer concentrates to hit a desired ppm nutrient level.
  • Scale any C1V1 + C2V2 problem for classroom or exam practice.
  • Verify that a proposed mixing ratio actually meets a target specification.

Frequently Asked Questions

Last updated: 2026-09-30 · Reviewed by Nham Vu