About the Dilution Calculator
Dilution equation C₁V₁ = C₂V₂ — find the stock volume, final volume or concentration you need.
Also known as: c1v1 c2v2, stock solution dilution, m1v1 = m2v2, dilute solution calculator, dilution factor.
How to use this calculator
- Enter solve for and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Dilution formula
C₁V₁ = C₂V₂
Worked example
Using the values pre-filled in the calculator above:
- Solve for: Stock volume needed
- Stock concentration = 5
- Final concentration = 0.5
- Final volume = 500 mL
the calculator returns:
- Stock volume needed: 50 mL
- Solvent to add: 450 mL
- Dilution factor: 10 ×
- Dilution ratio: 1 : 9
Tips & common mistakes
- Always add acid to water, never the other way round.
- Use any concentration unit you like, as long as both concentrations use the same one.