Kerning in Graphic Design: How Letter-Pair Spacing Shapes a Vector Logo

The short answer: what kerning means

Kerning is the adjustment of space between two specific characters. It differs from tracking, which changes spacing evenly across a whole word or line, and from leading, which sets the distance between lines of text. In logo design, kerning is usually the last refinement on a wordmark. The goal is spacing that looks even to the eye, which is not the same as spacing that measures equal between letters.

Kerning matters more in logos than in body text. A wordmark is shown large, repeated across many products and studied closely, so a gap that would go unnoticed in a paragraph becomes visible in the mark.

Kerning, tracking and leading compared

Term | What it controls | Scope | Typical use in a logo

Kerning | Space between one pair of characters | A single letter pair | Fixing uneven gaps such as A–V or T–o

Tracking (letter-spacing) | Uniform space across selected characters | A word, line or text block | Setting the overall density of a wordmark or tagline

Leading | Vertical distance between baselines | Lines of text | Stacking a name and descriptor, or multi-line lockups

In practice, tracking comes first because it sets the overall rhythm. Kerning then corrects the individual pairs that still look too open or too tight.

Why equal measurements look unequal

Letters differ in shape, so the same numeric gap produces different amounts of visible white space. Kerning compensates for what the eye perceives, not for what a ruler shows. The common patterns are:

• Two straight vertical strokes side by side, as in H and I, tend to need the most space.
• A straight stroke next to a round one, as in n and o, usually needs a little less.
• Two round shapes, as in o and o, need less again, because their curves already create extra space near the top and bottom.
• Diagonals and overhanging shapes, such as A, V, W, Y, T, L and the arm of r, create open pockets that often need to be pulled tighter.
• Some pairs at tight spacing can be misread, for example r and n reading as m, so legibility sets a limit on how close letters can sit.

Metric, optical and manual kerning

Most professional fonts include a built-in table of kerning pairs. Design applications can apply this table automatically, which is often called metric or auto kerning. Some applications, Adobe Illustrator among them, also offer optical kerning, which calculates spacing from the letter shapes rather than from the font's pair table. Optical kerning can help when a font has few kerning pairs or when typefaces are mixed. Neither setting is a substitute for manual review on a logo.

Manual kerning means adjusting individual pairs by hand. In Adobe Illustrator, kerning and tracking values are expressed in thousandths of an em, so an adjustment scales with the type size. For keyboard nudging, place the cursor between two letters and hold Alt (Windows) or Option (macOS) while pressing the left or right arrow. No universal correct value exists for any pair. The right amount depends on the typeface, the size and the rest of the word, so treat any fixed number as a starting point rather than a rule.

A practical kerning workflow for a wordmark

• Set the word in live type at roughly the size it will most often appear, and choose the tracking first.
• Apply the font's metric kerning, then compare it with optical kerning to see which gives a more even base.
• Find the pair that looks tightest or loosest and adjust the others to match the overall rhythm, rather than kerning letter by letter from left to right.
• Check spacing in context: at small sizes, at large sizes, and reversed out as light type on a dark background, where gaps can read differently.
• Use simple distancing tricks, such as viewing the mark upside down, blurring it or stepping back, so you see the shapes instead of reading the word.
• Save a copy before converting to outlines, then do the final fine-tuning on the outlined shapes if letterforms will be customized.

Kerning in custom lettering and modified letterforms

Once a designer starts altering letterforms, for example by trimming terminals, joining letters or drawing new glyphs, spacing becomes part of the drawing itself. Connected letters or ligatures remove a gap entirely. Customized shapes can change the white space around neighboring letters, so pairs that were balanced in the original font may need to be re-kerned after edits. In fully custom lettering, spacing is usually judged by eye across the whole word, because there is no font kerning table to rely on.

Size affects the decision. Spacing that looks right at billboard scale can close up and blur at favicon or small print sizes. Some identity systems therefore include a looser-spaced or simplified version for small use. Whether a particular brand does this depends on its guidelines; it is not a universal standard.

What happens to kerning in vector logo files

While text is live in a vector application, kerning is stored as type settings and depends on the font being installed. When the text is converted to outlines, each letter becomes an independent vector shape. The kerning settings no longer exist as editable values. The spacing is fixed into the positions of the shapes, and any further change means moving the paths directly.

• Outlined delivery files display correctly on machines that do not have the font, which is why final logo files are usually supplied with text converted to paths.
• A separate live-type working file, where the font license allows it to be shared, makes later spacing or wording changes much easier.
• A raster preview, such as a PNG or JPG, or a raster image embedded inside a vector container cannot be re-kerned without redrawing or tracing the letters.
• A PDF, EPS, AI or SVG extension does not prove the file contains editable vector paths. It may hold live text, outlined paths, an embedded raster image or a mix. Inspecting the file in outline or wireframe view shows which is present.
• In SVG, live text elements depend on the viewer having the font, while outlined paths keep the spacing exactly as designed.

Permissions: fonts, artwork and trademarks

Three permissions are separate. The right to download a logo file does not include the right to modify its artwork or re-kern its lettering. Converting a font to outlines does not remove the obligations of that font's license; whether logo use, modification or distribution of outlined glyphs is allowed depends on the specific license terms. A logo may also be protected as a trademark, so altering its spacing for unofficial use can raise brand and legal issues regardless of file access. When working on an existing brand, check the brand guidelines and the font license before changing the spacing.

Limits of this overview

No subject-specific measurements, product specifications or test results were available for this article, so it gives no recommended numeric kerning values, software comparisons or performance claims. The guidance above rests on general, widely documented typographic principles. Exact values and tool behavior should be confirmed against the typeface, application version and brand guidelines in use.