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Margin: why two vertical margins may not add up

Publisher: ResumeMaker • 1 source

Published: 23 Oct 2026 08:23 · Updated: 23 Oct 2026 08:23

AI source check: 22 Oct 2026 16:54. This is not editorial approval.

In a few sentences

In brief

margin sets outer space around a box. In certain block-layout situations, adjacent vertical margins collapse rather than forming a simple sum.

Useful to know

margin sets outer space around a box. In certain block-layout situations, adjacent vertical margins collapse rather than forming a simple sum. [1]

If two paragraphs with positive margins are closer than expected, investigate margin collapsing. Do not automatically transfer this behaviour to flex and grid layouts; the layout context matters.

Sources

For further detail and to check the information:

  1. [1] MDN — CSS margin ↗