G: When people talk about the file size of an average novel (plain text) — like something you’d download from Project Gutenberg — a good rough estimate is:

📏 Typical Plain-Text File Sizes for Novels

Short novel (≈ 40,000 words): ~ 250–400 KB
Mid-length novel (≈ 80,000–100,000 words): ~ 500 KB–1 MB
Long novel (≈ 120,000–150,000 words): ~ 1–1.5 MB

These estimates assume:

A basic UTF-8 plain text (.txt) file
No images, metadata, or ebook formatting

Why the File Sizes Are That Small

Plain text is very efficient:

Each character (letter, space, punctuation) ≈ 1 byte
A typical novel ≈ 300,000–500,000 characters
So 500,000 characters ≈ 500 KB

Comparisons

A short novella: ~ 200–300 KB
A typical mystery/genre novel: ~ 600–900 KB
A long epic (e.g., War and Peace): ~ 1.5–2 MB

If formatted as PDF, EPUB, or MOBI, the size goes up due to layout and metadata, but as plain text from Gutenberg, most novels fit comfortably under 1 MB.

If you want examples of specific books and their file sizes, just tell me a few titles!

M: I was just wondering because I have been talking to you a lot and I was trying to get an idea of how many novels I've written in terms of length, if not in content. All right, a parallel question with that purpose in mind. How large is your average, like, coffee table book or nonfiction discussion? You know, like, what's one of the good ones? I don't know, Science of Discworld, or there was one that was kind of popular about funeral parlors and the hidden costs and all that. Or maybe Freakonomics would be another good example.

G: TL;DR:
In plain text, most popular nonfiction “discussion” books land around 0.7–1.3 MB. True coffee-table books are the outliers — text alone might still be under 1 MB, but the actual files explode to 50–300+ MB because images dominate.

Narrative / Popular Nonfiction (text-driven)

Think readable, chapter-based, idea-forward books:

entity["book","Freakonomics","Levitt and Dubner 2005"]
~70–80k words → **~450–600 KB** plain text
entity["book","The Science of Discworld","Pratchett Stewart Cohen"]
~120k words → **~750 KB–1 MB** plain text
entity["book","Stiff","Mary Roach 2003"] (the funeral industry / cadavers one)
~95–100k words → **~600–700 KB** plain text

Rule of thumb:

60k words → ~400 KB
100k words → ~650 KB
150k words → ~1 MB

So if your accumulated chats are pushing 5–10 MB of raw text, you’re already in “several solid nonfiction books” territory by length alone.

Coffee-Table Books (image-driven)

These are a totally different beast.

Text content alone: often surprisingly small
→ 200–600 KB
Actual digital book (PDF / EPUB):
→ 50–300 MB, sometimes more

Why:

High-resolution photos
Full-page layouts
Color profiles, bleed margins, etc.

So a coffee-table book can feel huge while containing less text than Freakonomics.

Useful framing for you

If we ignore polish and count sheer textual mass:

1 MB of plain text ≈ 1 average book
10 MB of plain text ≈ a shelf
20–30 MB ≈ a career’s worth of nonfiction drafts

That’s not a claim about coherence or intent — just volume. But volume matters more than people like to admit.

If you want, I can also give you:

a word-count ↔︎ file-size conversion you can use mentally, or
a way to estimate your total output from chat logs without exporting anything.