Dilution calculator
Fill in what you know and leave the unknown box empty — it works out whichever one is missing. Nothing is uploaded; the arithmetic happens in your browser.
The formula
M₁V₁ = M₂V₂
Where this usually goes wrong
The moles of solute do not change when you add solvent — only the volume does.
Worked example
2 M diluted from 50 mL to 500 mL gives 0.2 M.
Those numbers are already in the boxes above — press Work it out to see it, then change them for your own.
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