About LetterForge

Good lettering looks effortless, but underneath every well-set poster or well-formed calligraphic line sits a set of measurements: how tall the x-height should read against the cap height, how much space to leave between letters at a given size, what angle to hold a broad-edge nib to get a particular thick-thin contrast, how a type scale steps from a headline down to a caption. Type designers and calligraphers learn these relationships by eye over years of practice — LetterForge exists to make the underlying numbers available to anyone working on a lettering project right now.

Instead of long essays, the site is built around a set of small, single-purpose calculators. The Font Pairing Suggestermatches a typeface classification — humanist serif, geometric sans, script, blackletter, and so on — to complementary pairings with real, freely available typefaces as examples. The X-Height & Line-Spacing Calculator turns a font size and x-height ratio into concrete pixel measurements and a recommended leading. The Letter-Spacing & Kerning Guide converts tracking between em, percent, and the per-1000-em units used in design software, and suggests how tracking should shift with point size. The Poster Type-Scale Generator builds a full modular type scale from a base size and a ratio — golden ratio, perfect fourth, major third, and more — for consistent poster and layout hierarchy. The Nib-Angle Guide works out the stroke width a broad-edge calligraphy nib produces in any direction, for a given pen angle, so you can predict the thick-thin contrast before you put ink on paper. And the Baseline Grid Calculator snaps a line height to the nearest multiple of a baseline unit and works out how many lines fit on a page.

Beyond the calculators, the blog and learn section cover letterform anatomy, calligraphy tools and technique, and type classification, and the LetterForge Museumis a browsable collection of lettering history — scripts, illuminated manuscripts, sign painting, and the story of type itself — with every entry, image, and fact drawn from Wikipedia and Wikimedia Commons.

A few things worth stating plainly. LetterForgeis independent and not affiliated with any type foundry, software vendor, or art school. It is supported by advertising, which is how the tools stay free with no account required. Every calculator here produces a general reference figure or suggestion built on common typographic and calligraphic conventions, not a rule that overrides your own eye or a client’s brief — type and lettering are visual crafts, and the final judgment on how something looks is always yours. If a tool looks wrong, or there’s a calculator you wish existed, the contact page is the place to say so.