Dilution Calculator

Calculate dilutions using C1V1=C2V2. Free online dilution and concentration calculator.

The Dilution Calculator uses the dilution equation C₁V₁ = C₂V₂ to solve for any unknown when diluting solutions. Enter three values to find the fourth. Essential for preparing laboratory solutions, medical dilutions, and any application requiring precise concentration adjustments.

Common use cases

  • Laboratory solution preparation
  • Medical and pharmaceutical dilutions
  • Pool chemical adjustment
  • Cleaning solution preparation
  • Research sample preparation

How to use

  1. Select which variable to solve for
  2. Enter the initial concentration (C₁)
  3. Enter the initial volume (V₁)
  4. Enter final concentration (C₂) or volume (V₂)
  5. Click calculate for the unknown

FAQ

What is the dilution equation?

C₁V₁ = C₂V₂: initial concentration × volume = final concentration × volume. Moles of solute stay constant.

How do I dilute 1 M to 0.1 M?

Use C₁V₁=C₂V₂: take 100 mL of 1M solution and add enough solvent to make 1000 mL total for 0.1M.

Does dilution add solute?

No, dilution only adds solvent. To increase concentration, you'd need to add more solute or evaporate solvent.

What about serial dilutions?

Apply C₁V₁=C₂V₂ repeatedly, or calculate the overall dilution factor as the product of individual factors.