How much more “data” does a QR code have, compared to a regular “bar code/UPC code”?

Question

I kind of understand how a UPC code works, but how is a QR code capable of “storing more data”?

In: Other

Answer 1

A UPC code stores precisely 8 digits and it does so only with vertical lines, with various combinations of black or white representing specific values. A QR code does this process over a whole grid, meaning there is simply space for more digits – the most dense version of the QR standard can store 7089 digits.