Ebook and print formatting solve different problems: ebook formatting has to work across variable screen sizes and reader settings, while print formatting has to work on one fixed physical page. If you're publishing in both formats, expect to prepare two genuinely different files, not one file that quietly works for both.
This is part of the Complete Guide to Book Cover Design and Interior Layout.
A print book has a fixed page size, and every element on the page (margins, font size, line spacing, headers) is set once and stays that way. An ebook, by contrast, is read on devices of many different screen sizes, and most e-readers let readers change the font, font size, and sometimes line spacing themselves. Ebook formatting has to be flexible enough to still look good no matter what the reader's device or settings do to it, which is a fundamentally different design problem than print.
Print covers are a single continuous file that includes the front cover, spine, and back cover, sized precisely to the book's trim size and page count (a thicker book needs a wider spine). This file needs bleed (extra image extending past the trim line) and has to meet the exact technical specifications of whichever printer or print-on-demand service you're using.
Ebook covers are a single, front-facing image only. No spine, no back cover, since there's no physical object. Ebook cover files have their own resolution and aspect ratio requirements, which differ from print specs.
Print interiors are laid out page by page, with decisions about margins (often larger on the inside edge to account for binding), consistent headers and footers, page numbers, and exact placement of chapter starts. Widows and orphans (a lone word or line stranded at the top or bottom of a page) are checked and fixed by hand, page by page.
Ebook interiors are built more like a flexible, reflowable document than a fixed page layout. Text reflows to fit whatever screen size and font settings the reader has chosen, so there's no fixed page count or page-by-page control. Formatting instead focuses on consistent styles (headings, body text, chapter breaks) that will look right regardless of how the text reflows.
Print files are typically prepared as press-ready PDFs, formatted to the exact specifications of the printer or print-on-demand platform (trim size, bleed, color profile). Ebook files are typically EPUB (the most widely supported format across retailers and devices) or, for some platforms, MOBI or KPF (Kindle-specific formats). These are fundamentally different file types built for different purposes, not just different export settings from the same source.
Print books require choosing a trim size (the physical dimensions of the book) upfront, since it affects margins, spine width, and cover dimensions. Common trim sizes vary by genre, mass market and trade paperback sizes differ, for instance, so this is worth researching for your category. Page count is also fixed once formatting is done. Ebooks have no equivalent concept; there's no physical trim size, and "page count" as reported by retailers is usually an estimate rather than a fixed number.
Print books typically use a simple, static table of contents with page numbers. Ebooks need a functioning, clickable table of contents built into the file's navigation structure, since readers use it to jump directly to chapters, and retailers often require it to meet a working standard before they'll accept the file.
Print formatting has full control over exactly where an image sits on the page. Ebook formatting has to account for images reflowing along with text, and images need to be sized and embedded in a way that works across a wide range of screen sizes without becoming distorted or oversized on a small device.
Budget for both as genuinely separate formatting work, even though they come from the same manuscript. Some layout services offer both as a package; if you're doing it yourself or piecing it together, confirm that whoever is doing your ebook formatting isn't just handing you a lightly modified print file, since the two need different underlying structure to work correctly.
Get Both Formats Done Right
Entrada Publishing handles interior layout for both print and ebook editions, each formatted for how it's actually going to be read.
No, not directly. The two require different underlying structure: print is a fixed page layout, while ebook text needs to reflow across different screen sizes and reader settings.
EPUB is the most widely supported format across retailers and devices. Some platforms, including Kindle, use their own formats such as MOBI or KPF in addition to or instead of EPUB.
Not in the same way it does for print. Ebooks don't have a fixed page count the way a printed book does; any page count shown by a retailer is typically an estimate.
Print margins are fixed and need to account for physical factors like binding, where text too close to the inside edge can be hard to read. Ebook text reflows based on the reader's device and settings, so there's no equivalent fixed margin to get wrong.