Q: Given the background description of some cooking related query, summarize the question into a title
The bag of coffee I am using instructs to "Add 2 1/2 tablespoons (37 ml)" of ground coffee. When I measure out 2 1/2 tablespoons onto my food scale, it only comes out to about 13 ml. Why does my 2 1/2 tablespoon measurement not equal 37 ml?
A:
Why does my 1 tablespoon of coffee grounds not equal 15 ml?