Dilution calculator

Solve C₁V₁ = C₂V₂ for the missing value — stock volume, final volume, or either concentration.

Stock solution

Final solution

C₁V₁ = C₂V₂. Units only need to be consistent — the same concentration unit on both sides and the same volume unit on both sides. The diluent line is V₂ − V₁ (the solvent to add). Leave the field you want to solve empty.

Everything runs in this browser.

How to use

  1. Fill any three of C₁, V₁, C₂, V₂.
  2. Leave the field you want to solve empty.
  3. Read the solved value, diluent to add, and dilution factor.

What it supports

Solves one unknown out of four positive values; final concentration must not exceed the stock's and final volume must not be smaller than the stock volume. Units are not converted — keep each pair in the same unit yourself. Serial dilution and w/v percent are not covered.

Related tools

Related guides