Middle Grade vs Young Adult: Word Counts and Differences

The two categories sit on different shelves, sell to different buyers and follow different rules on content. Getting the category right before you write saves a rewrite later, because it decides your main character’s age, your word count and your cover. If you’d rather have a writer who works in your age group, our children’s book ghostwriting covers illustrated middle grade and young adult novels. For younger readers, see what a chapter book is or the overview of every children’s book type.

Middle grade vs young adult at a glance

The quickest way to tell them apart is to compare the reader, the main character and the content side by side.

Lengths, point of view and endings follow agent Marie Lamba’s guide in Writer’s Digest; the YA reader age is YALSA’s. The word count section below has more detail by genre.

Reader age and character age

Middle grade is for readers about 8 to 12. Young adult is for 12 to 18, the range the American Library Association’s young adult division (YALSA) uses, though some agents, including Lamba, start YA at 13.

The main character is usually a little older than the reader, because kids “read up”: they like reading about characters older than themselves. Agent Marie Lamba puts middle grade main characters at about 10 for younger books and up to 13 for older ones. YA main characters are usually 14 or 15 for younger YA and up to 18, but not in college.

So a story about an 8-year-old is usually a chapter book rather than middle grade. A story about a 19-year-old in college belongs in new adult or adult fiction, not YA.

Middle grade and young adult word counts

Agent Marie Lamba gives 30,000 to 50,000 words for middle grade and 50,000 to 75,000 for young adult, with extra room for fantasy, where building a world takes pages. Agent Jennifer Laughran’s guide, updated in May 2026, breaks it down further:

Source: Jennifer Laughran, Andrea Brown Literary Agency, checked 18 October 2026.

Two cautions. Agent Kristin Nelson has cautioned that a middle grade novel under 40,000 words, or a YA novel under 50,000, might not be developed enough, though she adds she can’t know until she reads it. At the other end, Laughran advises debut authors not to go over 100,000 words unless they already have a following. Page counts for younger books are in our guide to how many pages a children’s book should be.

Themes and content: what fits each one

The biggest practical difference is what the story can show on the page.

• Middle grade can handle hard subjects such as grief, divorce or bullying, and it can be scary. It avoids swearing, graphic violence and sexual content, and romance stays at a crush or a first kiss. Parents, teachers and librarians often choose middle grade books, so strong language can cost you sales.
• Young adult can include swearing, violence, romance and sexual content, though none of it is required, and erotica is out. YA can also end less neatly. School and library support still matters, so heavy profanity may limit where the book is shelved.

A dark subject doesn’t make a book YA. What matters is how it’s shown, and whose story it is.

Voice and point of view

A middle grade voice sounds like a kid in the middle of things; a YA voice sounds like a teenager thinking about what it all means.

• Middle grade is often written in third person, and the character mostly reacts to what happens, with a little reflection. Former agent Mary Kole describes the voice as using “shorter sentences, a little bit more energetic.”
• Young adult is often written in first person, close to the character’s thoughts. The character looks inward and reflects on what happens.

Neither rule is fixed. Plenty of middle grade is in first person, and plenty of YA in third. The point of view matters less than whether the voice sounds like someone the reader’s age.

Upper middle grade and the 12-to-14 gap

Upper middle grade is a label for longer, more complex middle grade, often with a 12- or 13-year-old main character and few or no illustrations. At the other end, some younger YA has main characters around 14 or 15 and gentler content.

These labels help you shape the story, but they aren’t shelves. Rosemary Brosnan, then editorial director at HarperCollins Children’s Books, told Publishers Weekly in 2018 that the old 10-to-14 category “has disappeared,” so middle grade books are slotted into 8 to 12. Lamba advises calling your book simply middle grade or YA in a query letter, not upper middle grade or younger YA.

If your book sits on the line, the main character’s age and the content usually decide it. A 13-year-old with a first crush is middle grade; a 15-year-old in a first relationship is YA.

Is my book middle grade or YA?

Answer six questions to see which way your book leans.

Publishing middle grade vs young adult: categories, covers and buyers

The category you choose follows the book into every store, so set it up the same way everywhere.

• Subject codes. The book industry’s BISAC subject codes put children’s fiction (Juvenile Fiction) at ages 0 to 11 and Young Adult Fiction at 12 to 18. Pick codes from that one section only.
• Amazon KDP. Amazon has separate Children’s Books and Teen & Young Adult stores. To appear in Children’s categories, KDP says to set the reading age to one of its children’s bands: 0 to 2, 3 to 5, 6 to 8 or 9 to 12. For Teen & Young Adult categories, set it to 13 to 17. On Amazon.com, a book with Juvenile categories and a minimum age of 12 may be placed in either store, depending on other details about the book. If you answer yes to KDP’s question about sexually explicit content, the book can’t appear in Children’s categories and you can’t set a reading age. Our guide shows where the reading age goes.
• IngramSpark. Ingram’s metadata checklist lists audience codes for juvenile (0 to 11) and YA (12 to 17). It suggests a two-year age range for children’s books and a four-year range for YA, so a YA novel might use 14 to 17.
• Covers. Middle grade covers usually show an illustrated character or scene; YA covers often use bold title type over photographic or illustrated art, with nothing that looks childish. See our middle grade and YA cover conventions.
• Buyers. Middle grade is often chosen by parents, teachers and librarians. YA has a large adult readership: a 2012 Bowker study found that 55% of buyers of books for ages 12 to 17 were 18 or older, and adult buyers said they were buying for their own reading 78% of the time. In libraries, YALSA guidelines call for a distinct teen space, placed so its noise and activity stay away from quiet areas and the children’s area.

When you’re ready, see how we publish middle grade and young adult novels, and how to reach the parents, teachers and librarians who buy children’s books.

When to get help

If you’ve written the book, an edit checks the voice, the length and the content for your category. Middle grade and young adult novels are edited at our fiction rates: middle grade editing from 7.1¢ a word for line, copy and proofreading, or 10.4¢ for all four levels. YA uses the same rates on our book editing services page.

If you’d like the book written for you, every word is written by a human writer. Illustrated middle grade and YA novels use our children’s book ghostwriting Authority tier: $11,499 for up to 25,000 words, with up to 30 full-color illustrations, and $1,000 for each extra 5,000 words up to 60,000. Novels without illustrations use fiction ghostwriting at 33¢ a word, from $6,600 for 20,000 words.

Middle grade vs young adult: common questions

Is middle grade the same as middle school?

No. Middle grade describes the reader’s age, about 8 to 12, not the school. A middle grade book can be set anywhere, and middle school readers often read both middle grade and young adult. Agent Marie Lamba notes that middle school readers are split between the two shelves, so pick the category by your main character and content, not by the setting.

Can a middle grade book have a 13-year-old main character?

Yes. Older middle grade often has a 12- or 13-year-old main character, because readers like characters a little older than themselves. Keep the content within middle grade limits: friends, family and school at the center, romance no further than a crush or first kiss, and no graphic violence. Once the character is 14 or older, the book usually reads as YA.

Can young adult books have swearing?

Yes. Young adult can include swearing, violence and sexual content when the story needs it, though none of it is required, and erotica isn’t YA. Heavy profanity can still limit school and library sales, because teachers and librarians help choose what goes on the shelf. Use strong language where it’s true to the character, not for effect.

Is Harry Potter middle grade or young adult?

The first book is usually shelved as middle grade: Harry is 11, and Scholastic lists it for ages 8 and up. At roughly 77,000 words it was long for middle grade, though Lamba notes that’s not outrageous for middle grade fantasy. The later books grow longer and darker as Harry gets older, which is why readers often debate where the series fits.

Related reading

• What is a chapter book?
• How to become a children’s book author
• Every type of children’s book, by age