Sales per visitor is total sales revenue divided by the number of people who entered the store in the same period. If a shop takes $6,000 from 400 visitors, sales per visitor is $15. It combines two things: how many visitors buy, and how much they spend when they do.
It is calculated by pairing POS sales with a people counter's visitor count for the same hours. Because it includes visitors who buy nothing, it differs from average transaction value, which looks only at purchases.
Retailers use it to judge changes that affect both conversion and basket size, such as a new layout, staff training, product bundles or a promotion. It also helps compare stores of different sizes, as it adjusts for traffic. A store with low sales but a high figure per visitor may need more footfall, while the opposite points to a service or range issue.
The main caution is data quality. Overstated visitor counts, including staff or delivery movements, lower the result. Mismatched time periods, or sales from online or phone orders, can also distort it. Compare like with like and over enough days to smooth out noise. Many retailers track it weekly by store and by hour, because a single day can mislead.
It is a simple measure that shows whether growth is coming from more people, better selling, or both.