Kindle Font Size Guide — Making Text Large Enough to Actually Read

Most people set their Kindle font size once when they first get the device and never touch it again. If you're reading with degraded vision — macular degeneration, cataracts, age-related changes, anything — there's a good chance you've set it too small out of habit, or missed settings that would make a real difference.

This guide covers the full picture: what the font settings actually do, how the Kindle's "large" compares to a physical large print book, which settings matter most (and which don't), and the honest tradeoff about screen size that Kindle marketing won't tell you.

How to Change Font Size on a Kindle

The basics, quickly:

How Kindle Font Sizes Compare to Physical Large Print

This comparison comes from community measurements (notably from Kindle forums where users have held printed pages next to their screens):

Note: Exact point sizes vary depending on which font you've selected. Bookerly (Amazon's custom serif) renders slightly smaller than Palatino at the same size setting. Georgia renders slightly larger.

The practical takeaway: to get text equivalent to a Thorndike large print book (16pt), you need Kindle size 7 or 8. Most people default to size 3–5. If you've never pushed past 5, try 7 or 8 — the pages will be shorter but the reading experience will be genuinely different.

The Settings That Actually Help (Beyond Font Size)

Bold Text

Available in the font menu. Turn it on.

Bolder strokes are significantly easier to read when contrast sensitivity is reduced — which is exactly what happens with both cataracts and macular degeneration. This is probably the single most useful change for readers with vision challenges who haven't already done it.

Line Spacing

Added in the June 2025 firmware update. Set it to "Expanded" or the highest option.

This adds white space between lines, which reduces the eye's effort in tracking from the end of one line to the beginning of the next. Library and RNIB research suggests that increased line spacing benefits readers with visual processing difficulties more than font size alone.

Margins

Wider margins reduce the line width, which means shorter horizontal eye movement. For readers with vision loss affecting peripheral fields, narrower text columns are easier. Set margins to "Wide" in the font/layout menu.

Font Choice

Kindle offers Bookerly, Georgia, Palatino, and others. For low-vision reading, Bookerly and Georgia both perform well.

The OpenDyslexic font is worth trying if you have both vision issues and reading fatigue — it uses heavier bottoms on letterforms to anchor letters on the page. Some readers find it helpful, others find it jarring.

Screen Brightness and Warm Light

For evening reading: reduce brightness and increase the warm light setting (amber/orange tint). High blue-white brightness at night causes eye fatigue faster. Reduce brightness below 50%, increase warm light to 60–80%.

The Screen Size Problem: What Kindle Marketing Won't Tell You

Here's the honest version. People ask about it on r/Blind and r/ereader regularly, and the answer is consistent: at very large font sizes on a Kindle Paperwhite (6.8"), you get roughly half a paragraph per page. That means page-turning every 10–15 seconds for fast readers.

This bothers some people enormously. Others adapt to it quickly. But it's real, and worth knowing before you buy.

The solutions:

• Kindle Scribe (10.2" screen): At the same font size, you get roughly twice the text per page compared to the Paperwhite. Page-turns drop dramatically. The tradeoff is size and price (~$459 CAD) — it's not pocketable. But for home reading, the larger screen is genuinely better for high-font-size use.
• Kobo Elipsa 2E (10.3" screen, ~$399 CAD): Similar screen size advantage. Kobo's font size range goes higher and their large print settings are well-regarded in the low-vision community.
• iPad or Android tablet: The Kindle app on a 10–13" tablet with maximum font size gives you the most text per screen of any option. Not an e-ink display — backlit screens cause more eye fatigue over long sessions — but the reading experience at very large text is unmatched.

Kindle vs. Kobo for Low-Vision Readers

A Note on the Kobo's Custom Fonts

Kobo devices let you install your own fonts. This matters for low-vision readers because one font — Atkinson Hyperlegible — was specifically designed for readers with low vision by the Braille Institute.

It exaggerates the differences between easily-confused characters (like 1, l, and I, or 0 and O). It's free to download and install on a Kobo via USB or a sideloading guide.

Kindle doesn't currently support custom font installation. You're limited to Amazon's built-in options. For most readers that's fine — but it's a real advantage for Kobo if custom fonts are important to you.

When an E-Reader Isn't Enough

Some readers find that even at maximum Kindle font size, the text isn't large enough. If you're at maximum settings and still struggling, the next options are:

• A video magnifier (CCTV magnifier): Dedicated devices designed for low-vision reading. They display text on a screen at very high magnification, with adjustable contrast. Expensive ($300–$1,500+), but purpose-built. See our magnifier guide for specifics.
• DAISY books via CELA: Free for Canadians with print disabilities. DAISY format can be read with screen readers at adjustable speeds, so listening replaces reading. See our Canada resources guide for how to sign up for CELA.
• Text-to-speech on Kindle: Enable VoiceView in Accessibility settings. The device will read books aloud. Quality has improved significantly; it's not an audiobook narrator, but it's functional for reading sessions where eyestrain becomes the limiting factor.

An e-reader at the right settings solves the problem for most readers who want large text. But if you're past the point where even 36–40pt text is comfortable, the tools above are worth knowing about — and most of the best ones are free in Canada.