Donaldson R F Dilution Calculator
The standard dilution equation, C₁V₁ = C₂V₂ — solve for whichever value you need.
How this is worked out
Diluting a solution adds solvent but doesn't change how much solute is dissolved in it, so concentration times volume stays constant: C₁V₁ = C₂V₂. Any consistent pair of concentration and volume units works (this tool uses mol/L and mL, but g/L and L, or % and mL, work just as well, as long as you're consistent) — rearrange the same equation to solve for whichever one value you don't already know.
Frequently asked questions
How much solvent do I actually add?
The difference between the final and starting volumes, V₂ − V₁ — with the default example (10 mL diluted up to 100 mL), that's 90 mL of solvent added.
Does this work for serial dilutions?
Yes, one step at a time — just use each step's output concentration as the next step's starting concentration, and multiply the dilution factors together if you want the overall dilution across every step.
Related tools: Molarity & Molality Calculator, PPM & PPB Converter, Molar Mass Calculator.
Source / Last verified: standard general chemistry (the dilution equation C₁V₁ = C₂V₂, from conservation of the amount of solute) — read/checked 1 October 2026.