How to Use the Solution Dilution Calculator
Diluting a concentrated stock solution down to a working strength comes up constantly — in labs, cleaning, gardening, and cosmetics. This calculator is based on the C1V1 = C2V2 formula: just enter the stock concentration and the dilution factor (for a 1:10 dilution, enter 10) to get the final concentration instantly. Add your target final volume and it also tells you exactly how much stock solution to measure out and how much water to add.
A larger dilution factor means a lower final concentration. For example, a 10% stock diluted 1:10 gives a 1% final concentration, and if your target final volume is 16 fl oz, that means 1.6 fl oz of stock plus 14.4 fl oz of water. The math relies on the fact that the total amount of the diluted substance doesn't change during dilution.
Follow the dilution ratio on the product label, but calculating exact volumes ahead of time gives you more consistent results than eyeballing it each time. Leave the final volume field blank if you only need the final concentration.
Frequently Asked Questions
For a 1:10 dilution enter 10; for 1:100 enter 100. A larger factor means a lower final concentration.
It's the target final volume minus the stock volume needed, based on the C1V1 = C2V2 formula.
Leave the final volume field blank to get just the final concentration — stock and water volumes only appear once you enter a final volume.