To come up with these numbers, NAILS collected estimates from 11 professional nail companies of typical usage for common-sized containers. The companies only weighed in on the product categories that they offer, with some choosing to skip categories for which they could not supply accurate data in the allotted time frame. NAILS then selected the median value (rounded to the nearest whole number) from all of the estimates in each category, which are published here. Each median reflects estimates from at least four professional brands. Not all manufacturers offer all of the products or product sizes mentioned in the article.
There are a number of variables that will affect your actual product usage, including client nail length, product application technique, differences between specific products, and even how tightly you close the container between uses, so use this only as a general guide.