Layout & CSS Core A2 · Formal specification

Padding

Padding is the space inside an element’s border, between its content and its edge.

See how it works
You might call it inner spacing

See how it works

Original worked examplePadding

Another example

A button adds padding around its text, so the area people can click is larger.

Main parts

  1. 01Outer constraint
  2. 02Content and spacing model
  3. 03Computed size or reflow result

Use it when

Use padding to make room inside a surface and keep its target easy to use.

Do not use it when

Never add random padding to hide a wrong width model.

Name used in code

padding

Before you ship

Check content order, shared design values, component consistency, contrast, zoom, and layout changes by screen size. Verify every theme, language, and state. If there is motion, offer an equal reduced-motion experience.

Request you can copy

Outcome: Use or define Padding to make the visual experience clear and easy to use. User context: A button adds padding around its text, so the area people can click is larger. Design concept to apply: Padding. Why it fits: Use padding to make room inside a surface and keep its target easy to use. Do not use it when: Never add random padding to hide a wrong width model. Design requirements: Set the content order, shared design values, and reusable components. Define how the layout changes by screen size and state. Keep useful design choices separate from decoration. Inclusion and resilience: Check contrast, zoom, languages, themes, and reduced motion when needed. Do not use color or effects as the only way to show meaning. Acceptance criteria: The design stays clear on phones and desktops, at zoom, in every theme, and in all supported languages. Interactive states stay clear and consistent. Evidence and limits (evidence boundary): A formal document may still be a draft, release candidate, or final version. Check its status and browser or platform support. Unknowns to confirm: Brand limits, amount of content, supported themes and languages, target devices, and design-system rules.

Check this request

Review the current use of Padding. Definition: Padding is the space inside an element’s border, between its content and its edge. Release checks: Check content order, shared design values, component consistency, contrast, zoom, and layout changes by screen size. Verify every theme, language, and state. If there is motion, offer an equal reduced-motion experience. Before changing code, report the evidence you found, gaps, severity, and the smallest safe fix.

A2
How official is this term?

Formal specification

A published, versioned formal specification defines this term for the listed technical scope.

A formal document may still be a draft, release candidate, or final version. Check its status and browser or platform support.

Scope
CSS box model
Document status
draft
Checked on
2026-07-30

Evidence sources & scope

Authority source + Term reference · W3C CSS Working Group · draft CSS Box Model Module Level 4 — Paddings Paddings Scope: CSS box model; direct scope: Paddings Role here: Direct term reference Source covers: canonical name, definition, semantics, implementation Authority source · W3C CSS Working Group · draft CSS Box Model Module Level 4 Scope: CSS box model Role here: Authority within stated scope Source covers: canonical name, definition, semantics, implementation

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