A few days ago, I spoke about measuring the number of people entering a shop. I was asked today what sort of figure one could expect of how many people enter a shop compared to sales. This figure is called the conversion rate, and it depends on many factors, for example, is your shop a walk through, does the average person generally come in as part of a family or as an individual, the products you sell, the weather (if it rains you know the people coming in are keen to purchase), etc. So the figure does vary greatly between shops. As a rough estimate, our clients are looking at about 8%.
If you have further questions on this let me know.