Modular Scale Typography

Typography feels cohesive when all font sizes are related to each other through a single mathematical ratio. Without a scale, sizes get picked arbitrarily and the result feels visually noisy — headings that don't contrast enough, body text too close in size to captions, labels that blend into content.

What Is a Modular Scale

A modular scale starts from a base size and multiplies or divides by a ratio to generate every size in the system.

size(n) = base × ratio^n

Every size is thus a deliberate step away from the base — not a guess.

Choosing a Ratio