Most adult novels run between about 70,000 and 100,000 words, which usually prints as a paperback of roughly 250 to 400 pages. Writers & Artists puts a typical 300-400 page novel at 80,000-100,000 words, with fantasy and science fiction often longer and young adult, category romance and novellas shorter. The right length for your book depends on genre, reader expectations and, if you self-publish, what that length does to your print cost and price.

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This guide gives word counts by genre and sub-genre, shows how word count turns into page count, explains how length changes paperback printing costs on Amazon KDP, and covers why Kindle Unlimited readers and series authors often think about length differently from traditional publishers.

At a glance

• A standard adult novel is usually 70,000-100,000 words; 80,000-90,000 is a safe middle for most genres.
• Fantasy and science fiction run longer (around 100,000-125,000 is common); young adult, middle grade and category romance run shorter.
• Under about 40,000 words, most readers and award bodies treat a story as a novella rather than a novel.
• Page count depends on trim size, font and spacing, not words alone; a rough planning figure is 250-350 words per printed page.
• For self-publishers, every extra page adds to the KDP printing cost, which comes straight out of your paperback royalty.

How long is a novel? The short version

There is no legal or technical minimum, but publishers, agents, booksellers and readers share a fairly settled set of expectations. A book below about 40,000 words is generally called a novella. From 40,000 up, it is a novel, and most commercial adult fiction lands in the 70,000-100,000 range.

Traditional publishers care about length because it drives paper, printing and shelf price. Agents care because a debut that is far outside the expected range for its genre is harder to sell to an editor. Writers & Artists, the long-running UK writing resource, advises debut authors to stay at or below about 100,000 words where possible.

Self-published authors have more freedom, but the same economics still apply to print editions, and readers still arrive with expectations set by the books they already love.

Word counts by genre

The ranges below are a synthesis of common publishing guidance, including the Writers & Artists advice on novel length. Treat them as the zone where most books in each genre sit, not hard rules. Always check the specific publisher, imprint or competition you are targeting.

Genre or format	Typical word count	Rough paperback pages*	Notes
Adult general and commercial fiction	70,000-100,000	230-400	80,000-90,000 is a comfortable middle
Literary fiction	55,000-100,000	180-400	Wide range; voice matters more than length
Crime, thriller, mystery	70,000-100,000	230-400	Pacing usually favours the lower-middle of the range
Single-title romance	70,000-100,000	230-400	Sits close to general adult fiction
Category (series) romance	Around 50,000 for some lines	170-220	Set by each imprint’s guidelines
Fantasy and science fiction	100,000-125,000+	330-500	Worldbuilding adds length; debuts still advised to be cautious
Historical fiction	90,000-125,000	300-500	Research and setting often push it longer
Young adult	55,000-80,000	180-320	Fantasy YA can run longer
Middle grade (ages 9-12)	30,000-55,000	120-220	Younger end is shorter
Early readers (ages 5-8)	Around 20,000 or fewer	Varies	Often illustrated, short chapters
Picture books	Under 1,000	Usually 24-32	Page count driven by illustrations
Novella	17,500-40,000	70-160	Popular for series prequels and reader magnets

*Page estimates assume a common novel trim such as 5.5 x 8.5 inches with standard body text. Your real figure depends on your layout. See the conversion section below.

Romance sub-genres and category lines

Romance is the genre where length varies most, because it includes both long single-title novels and short, tightly defined category lines. Harlequin publishes its series lines to set word counts, and its own guidance says the requirements allow roughly 2,000-3,000 words either side of the target. Harlequin Presents (Mills & Boon Modern in the UK and Australia) is a well-known example with a 50,000-word limit. Other lines have their own figures, so check the current guidelines for the exact line before you write to it.

Self-published romance is less fixed. Contemporary, billionaire and small-town romance aimed at Kindle Unlimited readers commonly sits between category length and full single-title length, while romantasy and paranormal romance often run longer because they carry fantasy worldbuilding. If you are unsure what readers expect, look at the page counts of 10-20 recent books in your exact sub-genre and see where they cluster. Our guide to romance tropes can help you pin down which sub-genre you are really writing.

Novellas, novelettes and short stories

The clearest widely used boundaries come from the Science Fiction and Fantasy Writers Association, whose Nebula Award categories define a short story as under 7,500 words, a novelette as 7,500 to under 17,500, a novella as 17,500 to under 40,000, and a novel as 40,000 words or more. Many people outside speculative fiction use the same rough lines.

Novellas have found a strong second life in self-publishing as series prequels, bonus stories for newsletter subscribers, and bridges between full-length books.

How word count converts to page count

Readers often ask “how many pages in a novel?”, but page count is a result of layout, not a fixed property of the text. The same 80,000 words can print at under 250 pages or over 350 depending on four choices:

• Trim size. A 6 x 9 inch page holds noticeably more text than a 5 x 8 inch page.
• Font and size. Body text is usually somewhere between 10 and 12 point; some typefaces set much wider than others.
• Line spacing and margins. Generous leading and wide margins add pages. KDP also requires a larger inside margin as page count rises.
• Chapter openings and front and back matter. Chapters starting on a new page (often partway down), plus title page, copyright page, contents, acknowledgements and an author note, all add pages.

For planning, many formatters use 250-300 words per page for 5 x 8 and 5.5 x 8.5 inch novels and 300-350 for 6 x 9 inch books. That is an estimate, not a rule. The only reliable number is the one your formatting software gives you after you lay out the real manuscript.

Worked example

Take an 85,000-word contemporary romance. At around 280 words per page on a 5.5 x 8.5 inch trim, the text fills roughly 304 pages. Add perhaps 10-14 pages of front and back matter and chapter-opening space, and the finished paperback lands somewhere around 315-320 pages. Set the same text on a 6 x 9 inch trim at around 330 words per page and it comes in closer to 270 pages.

Why length changes your print cost and royalty

This is the part traditional word-count guides skip. When you self-publish a paperback through print on demand, every page has a cost, and that cost is subtracted from your royalty on every copy sold.

KDP’s printing cost help page sets out the formula for Amazon.com paperbacks as a fixed cost plus a per-page cost. At the time of writing (October 2026), for black ink on a regular trim size (up to 6.12 inches wide and up to 9 inches tall), books of 24-110 pages cost a flat US$2.30, and books of 110-828 pages cost US$1.00 plus US$0.012 per page. Large trim sizes cost US$1.00 plus US$0.017 per page in the same page range. Prices change, and other marketplaces use their own currency figures, so always check the current KDP pricing page and calculator.

Paperback length (black ink, regular trim)	Printing cost on Amazon.com	Royalty at US$14.99 list (60% rate)
200 pages	US$3.40	US$5.59
300 pages	US$4.60	US$4.39
400 pages	US$5.80	US$3.19
500 pages	US$7.00	US$1.99

These figures use the published KDP formula at the time of writing (October 2026); prices change. KDP pays 60% on Amazon.com paperbacks listed at US$9.99 or more and 50% below that, minus printing cost, and Expanded Distribution pays 40% minus printing. The table is an illustration of how length affects margin, not a prediction of what any book will earn.

Two practical lessons follow. First, a very long book forces a higher list price to keep a reasonable margin, and readers in some genres resist high paperback prices. Second, small layout choices such as trim size and font can save dozens of pages. Our guide to the economics of print on demand goes deeper on the maths, and how to price your book covers setting the list price itself.

Length, Kindle Unlimited and series

Ebooks have no printing cost, so length works differently. In Kindle Unlimited, KDP pays authors for pages read, measured using the Kindle Edition Normalized Page Count (KENPC). KDP’s help page explains that KENPC is calculated from standard formatting settings such as font and line spacing, counts from the start-reading location (usually chapter one) to the end, and includes images, charts and graphs. A customer can generate credit for a maximum of 3,000 pages per title.

That has two consequences worth understanding before you decide on length:

• Length is not a penalty in KU. A longer book that readers finish produces more pages read than a shorter one. Padding, however, tends to lose readers before the end, and reviews punish it.
• Series authors think in total reading time. Many KU series writers publish books at a length they can write and edit to a high standard on a regular schedule, so readers always have the next book waiting. Our guide to planning a series that builds loyal readers covers that side of the decision, and whether KDP Select suits you covers exclusivity.

The honest summary: there is no length that guarantees more income in KU or anywhere else. What matters is a book that fully delivers what its sub-genre promises, at a length readers of that sub-genre are used to.

How to choose the right length for your book

1. Name your exact sub-genre. “Romance” is too broad; “small-town second-chance romance” is useful.
2. Collect 10-20 comparable recent titles. Note their print page counts and trim sizes and convert to an approximate word count.
3. Decide your route. If you are querying agents or submitting to an imprint, follow their guidelines and the genre range. If you are self-publishing, you have more room, but readers’ expectations still apply.
4. Outline to the story, not the number. Plan the scenes the plot needs, then estimate length from your outline. Our step-by-step guide to writing a novel covers outlining.
5. Draft, then revise toward the range. First drafts often run long or short. Cut repetition and slow openings, or deepen subplots and character arcs if the story is thin.
6. Test the print layout early. Drop a draft into your formatting tool at your planned trim size to see the real page count and printing cost before you commit to a price.

Who should stick closely to the ranges, and who has flexibility

Situation	How strictly to follow genre length	Why
Debut querying literary agents	Closely	An out-of-range manuscript is an easy reason to pass
Submitting to a category romance line	Very closely	Each line publishes to a set word count
Self-publishing a standalone	Moderately	Reader expectations and print cost still matter
Self-publishing a long series in KU	Flexible within genre norms	Consistency across the series matters more than one number
Writing a prequel or reader magnet	Flexible	Novella length is normal and expected

Common mistakes

• Quoting page count instead of word count. Agents and publishers ask for words because pages depend on formatting.
• Padding to reach a number. Extra description and repeated scenes slow the story and are the first things editors cut.
• Ignoring the sub-genre. A 130,000-word cosy mystery or a 45,000-word epic fantasy will surprise readers in the wrong way.
• Forgetting print cost. A long paperback can leave very little royalty at the price readers expect. Check the KDP calculator before setting a price.
• Choosing trim size last. Trim size changes page count and cost, so decide it while you still have flexibility on price.
• Splitting one book into two just to have more titles. Readers notice when a story stops instead of ending, and reviews often say so.

Related guide: How to Write a Short Story: 7 Simple Steps Done Right.

Related guide: How to Write a Novella: Simple Steps to the Right Length.

Sources this guide draws on: Writers & Artists advice on novel length; Harlequin’s Write for Harlequin series guidance and Authors Publish’s summary of the Harlequin Presents guidelines; the Science Fiction and Fantasy Writers Association Nebula Award category definitions; Amazon KDP help pages on printing cost, paperback royalties and Kindle Edition Normalized Page Count.

Frequently asked questions

How many words is a 300-page novel?

Roughly 75,000-100,000 words, depending on trim size and layout. A 5.5 x 8.5 inch paperback with typical novel settings holds around 250-300 words per page, so 300 pages is about 75,000-90,000 words of text once chapter openings and front matter are allowed for.

What is the minimum word count for a novel?

The most common dividing line is 40,000 words, used by the Science Fiction and Fantasy Writers Association for the Nebula Awards. Below that, a story is usually called a novella. Commercial publishers often expect more, typically 70,000 words or above for adult fiction.

Is 50,000 words long enough for a novel?

Yes, for some markets. It is close to the target for several category romance lines and is fine for many middle grade and some young adult books. For most adult commercial fiction submitted to agents, it would be considered short.

How many pages are in an average novel?

Most adult novels print at roughly 250-400 pages. Writers & Artists links a 300-400 page novel to 80,000-100,000 words. Fantasy, historical fiction and literary sagas often go beyond that.

Do longer books earn more in Kindle Unlimited?

Not automatically. KDP pays for pages actually read, measured by KENPC and capped at 3,000 pages per customer per title, so an unfinished long book earns less than its length suggests. A book readers enjoy to the end is what produces pages read.

How long should a debut novel be?

Aim for the middle of your genre’s range. Writers & Artists suggests debut authors stay at or below about 100,000 words where possible, and the same caution applies to longer genres such as fantasy, where established authors can go much longer.

Get the story right first, then use the genre range, your comparable titles and a test print layout to bring it into shape. A novel that delivers on its promise at a length its readers expect gives you the strongest footing, whether you query agents or publish it yourself.