Calculator
Dilution calculator
How much stock solution goes into your final volume? Enter the stock, the volume you want and the concentration you need. Use it for working solutions, buffers from a 10X stock and antibiotic plates.
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Decimals and rounding
Far left picks a sensible number of decimal places for each value.
How it works
The calculator uses C1 × V1 = C2 × V2. It converts both concentrations into the same base unit, works out how much stock you need, and the rest of the final volume is solvent.
A dilution can only lower a concentration. If the target is higher than the stock, the calculator says so instead of giving a number.