Book Word Count Guide: How Many Words Should Your Book Be?

One of the first things new authors ask is: "How many words should my book be?"

And honestly? Most writers worry about this far too early — usually before they've finished chapter one. The better question is: how long does my book need to be to tell this story properly?

That's what actually matters. But general ranges genuinely help, especially if you're self-publishing for the first time and have no editor telling you what's normal. So here's the practical version, genre by genre, without the publishing jargon.

First: don't panic about word count

Your first draft will probably be too short, or way too long, or somehow both at once. That's normal. Books grow and shrink through editing — you'll add scenes, cut chapters, and rewrite whole sections you thought were genius at 2 AM.

So treat early numbers as a compass, not a verdict.

Word count ranges by genre

Non-fiction

Usually 30,000–70,000 words.

A lot of beginner non-fiction authors believe more words means more value. It doesn't. Readers want clarity, useful information and good pacing — not fourteen pages explaining something that needed two paragraphs. Shorter and helpful beats longer and exhausting, every time.

Self-help and business

Usually 40,000–60,000 words.

Look at the shelf of best-selling self-help: most of it is surprisingly short and direct. Nobody wants to feel trapped inside a 400-page motivational TED Talk.

Fantasy

Usually 80,000–120,000+ words.

Fantasy readers want immersion — more characters, more lore, more world. The genre runs long naturally, and honestly, fantasy authors seem biologically incapable of writing short books. If yours is 130,000 words and every chapter earns its place, you're fine.

Romance

Usually 50,000–90,000 words.

Romance lives on pacing and emotional build. Too short feels rushed; too long loses the momentum the genre depends on.

Thriller and mystery

Usually 70,000–100,000 words.

These genres run on "just one more chapter" energy. Momentum matters more here than anywhere — cut anything that slows the engine.

Children's books

This one varies enormously by age group:

• Picture books — often under 1,000 words
• Middle grade — roughly 20,000–50,000 words

Kids are brutally honest readers. If the pacing drags, they simply move on with their lives.

Turning words into pages

For a rough sense of physical size: a typical print layout runs somewhere around 250–300 words per page. So a 60,000-word book lands near 200–240 pages — a perfectly respectable paperback. (If you're printing through KDP, note it has a minimum page count for paperbacks, so very short works may need layout adjustments to qualify.)

What readers actually care about

Here's the thing most authors don't realise: no reader has ever finished a book and thought "wow, perfect word count."

They care about engagement, clarity, storytelling and pacing. A shorter book that holds people is worth far more than a long one padded to feel "professional".

And padding is the real danger. Readers can feel filler — you know those sections where even you got bored while writing them? They notice those too.

Short books are still real books

You don't need 150,000 words and 72 chapters for your book to count. Novellas sell. Short, sharp non-fiction sells. What you need is a book that delivers what its cover promises, at whatever length that takes.

What to do if you're way under or over

• Way under the range? Don't inflate — deepen. Underwritten drafts usually skip emotional beats and consequences, not words. Give scenes room to land.
• Way over? Edit in layers before you panic: how to edit your book without feeling overwhelmed walks through cutting structurally instead of line by line.
• Still drafting? Ignore the ranges entirely until the draft exists. The process in how to write a book from start to finish matters far more than the number at the bottom of the screen.

Write the book first. Count the words later.