Converting an EPUB to a PDF is the easy direction. An EPUB is structured text that knows what a chapter, a heading and a paragraph are, so a converter has everything it needs. The reverse trip is the hard one, and PDF to EPUB explains why.
What makes this conversion feel unpredictable is that a PDF needs decisions an EPUB never made.
What actually changes when you convert?
According to the W3C's EPUB 3.3 specification, EPUB publications are by default intended to reflow to fit the available screen. There are no pages in the file. The reading app invents them for whatever screen and type size the reader has chosen.
A PDF is the opposite: every page is fixed. So converting means choosing, once and permanently, things the EPUB left open.
| Decision | In the EPUB | In the PDF |
|---|---|---|
| Page size | None; the screen decides | Fixed, and you must pick |
| Margins | The app decides | Fixed |
| Type size | The reader decides | Fixed |
| Page numbers | None | Optional, added by the converter |
| Table of contents | A navigation menu | Bookmarks, or a printed contents page |
| Links | Work | Usually survive |
This is why two people converting the same EPUB get different PDFs. EPUB or PDF covers which format suits which job in the first place.
Which way should you convert?
| Method | Best for | Cost | Keeps the file on your machine |
|---|---|---|---|
| Calibre | Most people, and any repeat use | Free | Yes |
| Online converter | One small file, no install | Free within limits | No |
| Pandoc | People comfortable with a terminal | Free | Yes |
| Re-export from the source | A book you wrote | Depends on the tool | Yes |
How do you convert EPUB to PDF in Calibre?
Calibre is free, open source, and runs on Windows, macOS and Linux. The current version is 9.15, released on 18 September 2026 according to Calibre's release notes.
- Open Calibre and click Add books, then choose the EPUB.
- Select the book in the list and click Convert books.
- Set Output format, at the top right of the dialog, to PDF.
- Open PDF Output in the left column and set the paper size and margins.
- Open Look & feel if you want to set a base font size.
- Click OK, wait for the job to finish, then click the PDF link in the book's details panel.
The defaults are worth changing. According to the Calibre manual, the PDF paper size defaults to US Letter and the margins to 72 points, which is one inch.
| Setting | Where | What to choose |
|---|---|---|
| Paper size | PDF Output | A4 or Letter for printing at home; a custom size for a book-like page |
| Margins | PDF Output | 72 pt is safe for printing; less for reading on screen |
| Page numbers | PDF Output | On, for anything that will be printed |
| Printable contents page | PDF Output | On, for long documents |
| Embed fonts | Look & feel | On, so the PDF looks the same elsewhere |
A4, Letter or a trim size helps with the first row, and page margins and line length with the second. Fonts matter more than they seem: why a PDF looks wrong on someone else's computer is nearly always a font that was not embedded.
Calibre also has a command-line form, documented in its manual, for anyone converting more than one book:
ebook-convert book.epub book.pdf --paper-size a4 --pdf-page-numbers --embed-all-fontsCalibre: what it does well, and where it stops covers the rest of the program.
Are online converters safe to use?
They work, and the trade is that the book leaves your machine. For a public-domain novel that does not matter. For an unpublished manuscript it might.
The free limits below are as published by each service, read on 30 September 2026.
| Service | Free limit | File retention |
|---|---|---|
| CloudConvert | 10 conversions a day | Deleted within 24 hours |
| Zamzar | 2 files per 24 hours, up to 50 MB | Held for 24 hours |
Online converters also give you few or no page settings, so the result is a default page at a default size. For one file you need once, that is often fine.
Why will my ebook not convert?
Almost always because it is protected by DRM. Most books bought from Kindle, Kobo or Apple Books are. Calibre's manual is direct about it: "calibre will not convert these e-books."
DRM-free EPUBs convert normally. That includes books from publishers and stores that sell without protection, public-domain titles, and anything you made yourself.
If the book opens in a reading app but not in a converter, DRM is the cause, and no setting changes that. Most reading apps, Apple Books included, also have no export or print option for an EPUB.
Why does the converted PDF look plain?
Because an EPUB's design is deliberately light. It carries headings, emphasis and images, and leaves the rest to the reading app. A converter turns that into pages with default type, and the result is correct and unremarkable.
Things worth checking in the output:
- Chapter starts. Each chapter should begin on a new page. If they run on, enable the page break before chapters in Calibre's Structure detection.
- Images. Large images can fall across a page edge or shrink. Cover images often land alone on page one, which is right.
- The cover. An EPUB can carry its cover in two places, which sometimes produces it twice. How to edit an EPUB cover explains the cause.
- File size. Image-heavy books produce large PDFs. Shrinking a book PDF covers the fix.
What conversion will not give you is a typeset book. There is no control over widows, no running heads worth the name, and tables break wherever the page ends.
Can you use a converted PDF for print on KDP?
Technically, and it is rarely a good idea. According to KDP's help pages, an ebook can be uploaded as an EPUB, so no conversion is needed there. A paperback needs a PDF at the book's trim size with fonts embedded, and bleed if anything reaches the page edge.
A converted EPUB can meet the letter of that and still look like a printed web page. What Amazon KDP actually wants from your file and what makes a PDF print-ready set out the difference.
If the book is yours, do not convert at all
Converting is what you do with a file you were given. If you wrote the book, you have something better than the EPUB: the manuscript it was made from. Export the PDF from that, and both files stay in step.
This is the reason to keep the manuscript as plain text. bukpress takes a Markdown file and produces a typeset PDF and a reflowable EPUB from the same source, so neither is derived from the other and a correction is one edit and one rebuild. Self-publishing from Markdown is that route, and five ways to convert Markdown to PDF compares it with the alternatives, Pandoc among them.
To be plain about the limit: bukpress does not convert EPUB files. If all you have is an EPUB, whether one you bought or one whose source is lost, it does nothing for you, and Calibre is the right tool. It helps only when you still have the text.
Common questions
What is the best free EPUB to PDF converter?
Calibre. It is free, runs locally so the book stays on your machine, and gives you control over paper size, margins and fonts. Online converters are quicker for one small file.
Can I convert EPUB to PDF on a phone?
Through an online converter in the browser, yes, within its free limits. Calibre itself is a desktop program.
Does converting EPUB to PDF lose quality?
Text stays sharp, because it remains text. What you lose is flexibility: the PDF has one page size and one type size, and reads poorly on a small screen.
Can I print an EPUB without converting it?
Usually not. Most reading apps have no print option, so converting to PDF first is the normal route.
Can I convert EPUB to PDF with Pandoc?
Yes. Pandoc reads EPUB and writes PDF through a separate engine such as LaTeX. According to the Pandoc manual, the command is pandoc book.epub -o book.pdf with a PDF engine installed.