Dilution Calculator

How to use the dilution calculator

1. Choose which value to solve for: stock volume, final volume, stock concentration or final concentration.
2. Type the other three values, each with its unit.
3. The answer appears with how much stock and diluent to mix.

Frequently asked questions

What is C1V1 = C2V2?

The amount of substance does not change when you dilute: the stock concentration times the stock volume equals the final concentration times the final volume.

Can I mix units?

Yes, as long as both concentrations are the same kind: both molar, both percent, both mass per volume, or both X.

What does a concentration difference do?

Particles spread from the concentrated side to the dilute side until the concentrations match. The Diffusion and Osmosis Simulator shows this, and what happens when only water can cross a membrane.