Solve C1V1 = C2V2 to find the stock volume and diluent needed, the final concentration, the final volume or the stock concentration of a solution.
About this tool
Solve C₁V₁ = C₂V₂ for stock volume, diluent, final concentration or volume.
How to use Drug Dilution Calculator
- Choose which value to solve for.
- Enter the other three values, with both concentrations in the same unit.
- Read the result, the diluent to add and the dilution factor.
Worked example
To make 250 mL of a 2 mg/mL solution from a 50 mg/mL stock, take 10 mL of stock and add 240 mL of diluent.
Is V2 the diluent volume?
No. V2 is the final total volume. The diluent to add is V2 − V1.
Can I mix units?
No. Both concentrations must use the same unit, and both volumes the same unit, for the formula to work.
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