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Utilities · 100% browser-side

Typography Scale Generator

Base size × ratio = a full heading scale, exported as CSS variables or fluid clamp().

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Base size (px)
Your body-text size. 16px is the browser default and a solid choice.
Scale ratio
Each step multiplies by this. Smaller ratios suit dense UIs; larger ones suit editorial pages.
5xl · 61.0pxThe quick brown fox
4xl · 48.8pxThe quick brown fox
3xl · 39.1pxThe quick brown fox
2xl · 31.3pxThe quick brown fox
xl · 25.0pxThe quick brown fox
lg · 20.0pxThe quick brown fox
base · 16.0pxThe quick brown fox
sm · 12.8pxThe quick brown fox
xs · 10.2pxThe quick brown fox
CSS custom properties
:root {
  --text-xs: 0.640rem; /* 10.2px */
  --text-sm: 0.800rem; /* 12.8px */
  --text-base: 1.000rem; /* 16.0px */
  --text-lg: 1.250rem; /* 20.0px */
  --text-xl: 1.563rem; /* 25.0px */
  --text-2xl: 1.953rem; /* 31.3px */
  --text-3xl: 2.441rem; /* 39.1px */
  --text-4xl: 3.052rem; /* 48.8px */
  --text-5xl: 3.815rem; /* 61.0px */
}
Fluid scale with clamp()
:root {
  /* Fluid: 80% size on small screens, full size at 1280px+ */
  --text-xs: clamp(0.512rem, 0.512rem + 0.160vw, 0.640rem);
  --text-sm: clamp(0.640rem, 0.640rem + 0.200vw, 0.800rem);
  --text-base: clamp(0.800rem, 0.800rem + 0.250vw, 1.000rem);
  --text-lg: clamp(1.000rem, 1.000rem + 0.313vw, 1.250rem);
  --text-xl: clamp(1.250rem, 1.250rem + 0.391vw, 1.563rem);
  --text-2xl: clamp(1.563rem, 1.563rem + 0.488vw, 1.953rem);
  --text-3xl: clamp(1.953rem, 1.953rem + 0.610vw, 2.441rem);
  --text-4xl: clamp(2.441rem, 2.441rem + 0.763vw, 3.052rem);
  --text-5xl: clamp(3.052rem, 3.052rem + 0.954vw, 3.815rem);
}
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01 · Real-world fits

Common use cases

  • Starting a design system with a mathematically consistent heading hierarchy
  • Replacing a codebase's accumulated random font sizes (13px, 15px, 17px, 22px…) with a rational scale
  • Generating fluid typography that shrinks gracefully on mobile without media queries
  • Comparing how different ratios feel before committing a brand direction
02 · The honest pitch

Why Typography Scale Generator?

Most interfaces accumulate font sizes one ad-hoc decision at a time until nothing lines up. A modular scale replaces those decisions with one: pick a ratio, and every size follows from it — the same principle musical intervals use, which is why the ratios carry names like Perfect Fourth. This generator shows the scale rendered live (not as abstract numbers), and exports both static CSS variables and fluid clamp() values, so responsive type needs no breakpoints at all.

03 · Edge cases

Frequently asked questions

Interfaces with lots of UI chrome and data want restraint: Major Second (1.125) or Minor Third (1.2) keep headings from shouting. Content-first pages — blogs, marketing, editorial — can carry Perfect Fourth (1.333) or Golden Ratio (1.618) for real drama between levels. When unsure, Major Third (1.25) is the safe middle.