Blank pages, recto and verso, and why the count is even
The proof arrives, you open it, and somewhere around chapter three there is a page with nothing on it. Then another. Then the book ends and there are two more. Nothing has gone wrong, and the file does not need fixing — but almost every first-time author tries to fix it, and deleting those pages is what makes a book feel subtly amateur afterward.
Here is what those pages are and where they come from.
Recto and verso
A right-hand page is a recto. A left-hand page is a verso. In any book set left to right, rectos always carry odd page numbers and versos always carry even ones. That never varies, in any book you have ever picked up.
The consequence is worth stating plainly, because it is the root of everything below: page 1 is a right-hand page, page 2 is its own back, and so on forever. You cannot make a right-hand page even-numbered by wishing.
A sheet has two sides
The thing a printer binds is a leaf — one physical sheet of paper with a front and a back. Two pages per leaf, always. There is no way to bind half a leaf into a book.
So a bound book's page count is always even. If your text ends on page 313, the book is at least 314 pages, and the 314th is the back of the sheet your last sentence is printed on. Nobody prints one side and trims the other away.
Offset printing adds a second layer to this, because many pages are printed on one large sheet and folded — which is why traditionally printed books were planned to land on particular counts. Print on demand binds to your exact page count and only cares that it is even. Print on demand or a print run? covers which one you are dealing with.
Chapters open on the right, so half of them leave a blank
In trade books, chapters conventionally open on a recto. When the previous chapter happens to end on a recto, the verso that follows is left empty so the next chapter can start where it belongs.
Chapter endings fall on left and right pages at roughly even odds, so in a forty-chapter novel you should expect something near twenty blank versos. That is the convention working, not a fault. See Chapter openings and scene breaks for what else the opening page does differently.
A blank page is genuinely blank
A page left empty by this rule carries no running head and no folio. It is counted in the sequence and printed with nothing on it, so a reader turning to it sees paper.
Printing a page number on a blank page is one of the fastest tells that a book was poured rather than set — the blank is meant to read as a pause, and a stray numeral in the corner turns it into a mistake. Running heads and page numbers covers every other place these are suppressed.
You may have seen "This page intentionally left blank" in a manual or a legal document. That is a convention for documents where a missing page would be a problem. It does not belong in a trade book, and it is self-defeating anyway.
In the Interior Formatter. The final page count always comes out even, because that is what printers require, and front and back matter are built from the fields you filled in — so the rectos, versos and blanks work out without you hand-counting anything. That final count then flows to the Cover Maker, which computes the spine from it. Start a book → · about the Interior Formatter
The lever you actually have
You get one real choice here, and it changes both the feel of the book and its length.
- Chapters always open on a recto. The formal option, and the default in trade fiction and in nonfiction from publishing houses. Every chapter starts in the same place on the spread, which gives the book a steady rhythm. It costs you the blanks.
- Chapters open on the next page, either side. Every chapter starts on the page after the last one ends, recto or verso. No blanks at all. Common in mass-market paperbacks, in genre series, in very long books, and in anything where the page count is under pressure.
The saving is real. Take the forty-chapter novel above: about twenty pages, and on KDP white paper at 0.002252 inches per page, that is roughly 0.045 inches off the spine. Printers also charge by the page, so pages are money — the rate varies by printer and changes, so check yours rather than trusting a number in a blog post.
Page count has hard edges too. KDP prints text on a spine only above 79 pages, so a short book can go the other way and want the blanks.
Front matter runs on the same arithmetic
The pages before chapter one are placed by exactly these rules, which is why their order looks fixed. The half title is a recto. The title page is a recto. The copyright page is a verso for one reason only: it is the back of the title page. The dedication is a recto and sits alone.
Wherever one of those elements would land on the wrong side, a blank goes in ahead of it. What goes in the front of a book, and in what order lists the full sequence.
The pages at the very end
Back matter follows the same convention, so if your acknowledgments finish on a recto, the verso behind them is blank — and the book may then need one more leaf to reach an even count. Two blank pages at the end of a printed book is an ordinary result, not a truncated file.
When you check a proof, count the blanks by asking what is on the page before each one. If the answer is the end of a section, it is doing its job.
Make yours
Everything here is built into the tools, and they are free to use: name your book, bring your manuscript or your artwork, and work as long as you like. You only pay when you want the files without the preview watermark.
Next: Parts, sections and the pages between chapters · Also: Drop caps and ornamental chapter openings · What goes in the front of a book, and in what order · How to calculate spine width