Build a modular typography scale

Use a single ratio to derive every font size on the site.

5 min read intermediateUpdated Apr 7, 2025
BI
Reviewed by the editorial team · Apr 7, 2025

Step by step

  1. 01

    Pick a base

    16px on web, 17–18px for content-heavy sites.

  2. 02

    Pick a ratio

    1.25 (Major Third) for editorial. 1.333 (Perfect Fourth) for marketing.

  3. 03

    Generate the scale

    16, 20, 25, 31, 39, 49 — use type-scale.com to preview.

  4. 04

    Map to roles

    Body, lead, h3, h2, h1, display. Skip sizes you don't need.

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