Property Reference - CSS Reference - page 206

Name
line-height
Values:
<length> | <percentage> | <number> | normal | none
Initial value:
normal
Applies to:
All elements (but see text regarding replaced and block-level elements)
Inherited:
Yes
Percentages:
Relative to the font size of the element
Computed value:
For length and percentage values, the absolute value; otherwise, same as declared value
Description:
This property influences the layout of line boxes. When applied to a block-level element, it
defines the minimum (but not the maximum) distance between baselines within that element.
When applied to an inline element, it is used to define the leadingof that element.
The difference between the computed values of line-height and font-size (called “lead-
ing” in CSS) is split in half and added to the top and bottom of each piece of content in a line
of text. The shortest box that can enclose all those pieces of content is the line box.
A raw number value assigns a scaling factor, which is inherited instead of a computed value.
Negative values are not permitted.
Examples:
p {line-height: 1.5em;}
h2 {line-height: 200%;}