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Dilution calculator
Dilution Calculator
Calculate lab-grade dilutions with precision, unit flexibility, and clear step-by-step preparation instructions.
Input
Input values
About the Dilution calculator
Work out how much stock solution and solvent you need to make a more dilute solution.
How to use the Dilution calculator
- Enter the Initial concentration (C1) and its Units.
- Enter the Final concentration (C2) and Final volume, or a Dilution factor.
- Press Calculate.
Formula and method
C₁ × V₁ = C₂ × V₂, so V₁ = C₂ × V₂ ÷ C₁. The solvent to add is V₂ − V₁.
Worked example
To make 500 mL of 2 M solution from a 10 M stock, take V₁ = 2 × 500 ÷ 10 = 100 mL of stock and add 400 mL of solvent.
Tips
- Add acid to water, never water to acid.
- Use the same units for both concentrations.
Frequently Asked Questions
The ratio of final volume to stock volume. A 1:10 dilution has a factor of 10.