What is the ideal line height for body text?

1.5-1.6 for most body text at 16px. Increase to 1.6-1.8 for longer line lengths (70+ characters per line). Decrease to 1.4-1.5 for shorter line lengths or larger font sizes.

Should I use px or unitless values for line-height?

Always use unitless values (line-height: 1.5). They scale proportionally with font size. Fixed values (px, em) cause inheritance issues when child elements have different font sizes.

What line height should headings use?

1.1-1.3 for headings. Larger text needs tighter line height because the vertical space between lines becomes visually larger at bigger font sizes.

How to Calculate Line Height for Web Typography

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