If not, maybe this article will help:
Continued: How to Tame Line Height in CSSIn CSS, line-height is probably one of the most misunderstood, yet commonly-used attributes. As designers and developers, when we think about line-height, we might think about the concept of leading from print design — a term, interestingly enough, that comes from literally putting pieces of lead between lines of type.
Leading and line-height, however similar, have some important differences. To understand those differences, we first have to understand a bit more about typography...