Calculate the volume of stock solution and diluent needed for a target concentration.
The number of moles of solute is unchanged by dilution, which is what makes C₁V₁ = C₂V₂ work. Always add stock to solvent and make up to the mark rather than adding a calculated solvent volume. Dilution factors above about 100 in one step are inaccurate because the stock volume becomes too small to pipette reliably, which is why serial dilution exists.
Solution Dilution
C₁V₁ = C₂V₂
C₁V₁ = C₂V₂ The number of moles of solute is unchanged by dilution, which is what makes C₁V₁ = C₂V₂ work. Always add stock to solvent and make up to the mark rather than adding a calculated solvent volume.
Dilution factors above about 100 in one step are inaccurate because the stock volume becomes too small to pipette reliably, which is why serial dilution exists.
This calculator takes 3 inputs: Stock concentration, Target concentration, Final volume required. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.