Typography Scale Calculator
Build a readable type system in seconds. Enter your base font size, choose a scale ratio, and generate heading sizes, spacing, and starter CSS.
Tip: Try ratio 1.2 for calmer UIs, 1.25 for balanced blogs, and 1.333 for bolder editorial hierarchy.
What is calculator typography?
Calculator typography is the practice of using simple math to create consistent, readable type systems. Instead of picking random font sizes for headings and body text, you select a base size and a scale ratio. The calculator then generates predictable sizes for each heading level, plus line-height and spacing recommendations.
In practical design work, this solves a common problem: visual inconsistency. Without a system, text rhythm feels uneven and pages become harder to scan. With a calculated scale, your content gets clear hierarchy, cleaner layout decisions, and a more professional feel.
Why a typography calculator helps on real websites
1) Faster design decisions
A scale gives you instant defaults. You can stop debating whether an H2 should be 29px or 32px and focus on content quality. That speed matters when shipping blog posts, landing pages, and product docs.
2) Better readability and comprehension
Good typography lowers cognitive load. If body text, headings, and spacing work together, readers stay engaged longer. This supports conversions too: people are more likely to trust and act on content that feels easy to read.
3) Easier collaboration
Teams make fewer design mistakes when values are systemized. Developers can implement tokens directly, content writers can structure headings consistently, and designers can maintain brand tone across pages.
How to use this calculator effectively
- Start with body size: 16px is a reliable default for most desktop-first articles.
- Pick your ratio by tone: lower ratio feels calm and practical; higher ratio feels dramatic.
- Set line-height for comfort: 1.5–1.7 usually works for paragraph-heavy pages.
- Check line length: around 60–75 characters per line is usually readable for long-form content.
- Adjust on real content: test with actual headlines and paragraphs, not placeholder text only.
Recommended starting presets
Blog / editorial
Base 16px, ratio 1.25, line-height 1.6, measure 65ch.
Dashboard / SaaS UI
Base 15–16px, ratio 1.2, line-height 1.45–1.55, shorter measure for denser screens.
Marketing hero sections
Base 16–18px, ratio 1.333, tighter heading line-heights, stronger contrast in spacing.
Common typography mistakes this avoids
- Heading sizes that are too close together to establish hierarchy.
- Random vertical spacing that breaks reading rhythm.
- Overly long line lengths that make paragraphs tiring.
- Hard-coded one-off sizes across templates and components.
- Poor accessibility due to tiny base sizes or cramped lines.
Accessibility and responsive notes
Keep body text comfortably readable and avoid shrinking below 16px on content-heavy pages unless you have a very specific context. Use unitless line-height so text scales naturally. If you move this system into production, consider converting sizes into rem and using clamp() for fluid responsiveness.
Finally, always test with users on different devices. A mathematically perfect scale is only useful if people can read it comfortably in real conditions.
Final takeaway
Typography calculators are not about design rigidity. They are about reducing decision fatigue and creating consistency. Start with math, then refine with judgment. That combination is where clean, readable, and trustworthy web typography comes from.