Dilution Calculator (C1V1=C2V2)
Solve C1V1 = C2V2 for any missing dilution value.
Dilute to the right strength
The dilution equation, C1V1 equals C2V2, relates the concentration and volume of a stock solution to the diluted result. Know any three values and the fourth follows.
To make 500 mL of a 0.1 M solution from a 1 M stock, you need 50 mL of stock topped up with water. Set the value you want to find to zero and the calculator solves it.
Handy and private
The calculation runs in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
What does it solve?
The dilution equation, concentration one times volume one equals concentration two times volume two. Leave the unknown as zero.
What units?
Any consistent units, as long as both concentrations match and both volumes match.
What is it for?
Preparing a diluted solution of a target concentration from a stock solution.
Browse the full set of free, private, in-browser tools.