While our droppers have graduated markings that are accurate to 0.25ml (see above table), there is no standard for the amount of drops any given dropper will give per ml. The materials the dropper is made from, the type of fluid (water vs. oil) and manufacturing tolerances all contribute to this. Currently, our droppers give approximately 40 drops per ml. Always calibrate your dropper if you want to use even finer increments than the table gives. Simply take up a ml of common kitchen oil, like olive oil, and count the drops. The only time you are likely to need this is if you are determining the serving size for a small pet.
A note on droppers: Keeping the dropper clean and devoid of any bacteria is essential to your health and the preservation of the hemp extract. If you choose to use the dropper for oral application of our hemp extracts, take special care to keep it from coming in contact with the interior and exterior of your mouth. It is recommended that you clean the dropper after each use, especially if it comes in contact with your mouth, with an alcohol swab to ensure proper storage of the product.