You can't directly convert cups to ounces for lean hamburger because density varies. Here's why:

* Ground meat isn't uniform: The fat content and how tightly the meat is packed will affect its density.

* Packing matters: A cup of loose, crumbly hamburger will weigh less than a cup of densely packed meat.

Instead of using cups, it's best to use weight measurements for ground beef.

Here's a helpful rule of thumb:

* One cup of ground beef typically weighs about 4 ounces.

However, always double-check the weight of the package you purchase to ensure accuracy.