KDP calculators that do the maths for you
Royalty per copy, printing cost, pricing, spine width and page counts — worked out from Amazon KDP's published rates, with the source and the check date on every page. No sign-up.
Rates checked 2026-11-10
300-page 6×9 · print cost per copy
US
$4.60
CA
CA$6.06
UK
£3.85
EU
€4.35
Spine
0.6756″
Cover wrap
12.926″
Interior
6.125 × 9.25″
Free tools
Start with the number you need
Six calculators, one rate table. Every page shows its working.
- MoneyOpen calculator
KDP royalty calculator
What you actually earn per copy, after printing and the 50/60% cliff.
- MoneyOpen calculator
KDP printing cost calculator
Cost per copy for every marketplace, ink type, trim and page count.
- MoneyOpen calculator
Book pricing calculator
Royalty at every price, so you can see the cliff before you pick one.
- MoneyOpen calculator
Self-publishing cost calculator
Editing, cover, ISBN and ads — totalled, and how many copies pay it back.
- PrintOpen calculator
Book spine width calculator
Exact spine and full cover wrap size, including the 0.125" bleed.
- WritingOpen calculator
Word count to pages
Pages, spine width, print cost and reading time from one word count.
- Browse the hub
All six calculators
Grouped by what they answer: money, print and writing.
- See pricing
What a finished book costs
Credits per book, packs and 14-day refund rules — published before launch.
What you can make
Six kinds of book, six different sets of rules
Each type has its own page count conventions, interior rules and upload quirks. Pick the one you are making and read its page.
- Open the page
6×9 · 5×8 · 5.5×8.5
Fiction and nonfiction
Novels, novellas, guides and workbooks — chapters, front matter and a cover wrap sized to the page count.
- Open the page
8.5×11 · 8.5×8.5
Coloring books
Bold line art, one design per page, single-sided so markers do not bleed through.
- Open the page
8.5×8.5 · landscape
Children's picture books
One locked cast, the same hero on every page, 24-page layouts and full-colour interiors.
- Open the page
cost math + files
Print-on-demand colouring
What a copy costs, the two files you upload, and how page count decides your price.
- Open the page
seasonal · Aug–Nov
Seasonal colouring
Christmas books with a deadline: eight themes, upload-ready before the season peaks.
- Open the page
free calculator
Workbooks and journals
Check the page count before you commit: word count to pages, spine width and print cost in one place.
The book builder · opening later
Four kinds of book, all built to KDP's trim and bleed specs
The AI builder is not open yet. These are the four shapes it produces: a colouring book, a children's picture book, a novel and a workbook — each with an interior PDF, a cover wrap sized to the page count, an EPUB 3 and an editable Word file.
Christmas Coloring Book
30 bold line designs · single-sided
8.5×11 · 66 pp
The Little Lighthouse
One locked cast, same hero on every page
24 pp · full colour
The House Between Tides
18 chapters · consistent voice
6×9 · 284 pp
KDP Launch Workbook
10 chapters, exercises and checklists
7×10 · 120 pp
Look inside
Six books, laid out at their real trim size
Specs are easy to claim. These pages are actual book pages — margins, bleed, spine and cover wrap included — and each has an interior excerpt you can download.
Why the numbers hold up
Every figure comes from KDP's own rate tables
Marketplaces
8
US · UK · EU · CA · AU · JP · PL · SE
Ink & paper types
4
B&W, groundwood, standard and premium colour
Gold tests
42
KDP worked examples, checked monthly
Rates from Amazon KDP's published printing-cost and royalty pages, checked 2026-11-10. The calculators above and the builder below read the same table.
How it works
Three steps from a sentence to files Amazon accepts
- 01
Describe the book in one or two sentences
Genre, audience, length, trim size. No forms to fill in, no account needed to try the calculators.
- 02
Review the plan and the exact credit quote
Chapter or page plan, title options, cover direction. Planning is free — credits are only spent when you approve.
- 03
Download print-ready files
Interior PDF with bleed, cover wrap sized to the page count, EPUB 3 and an editable Word file, plus the KDP upload checklist.
Credits
Pay only when you approve a book
Planning, previews and the quote are free. Credits are spent only on approval, and unused credits are refundable within 14 days.
Starter pack
$12.00 USD
120 credits
- First book most people make
- Never expires
Studio pack
$29.00 USD
320 credits
- Two to three books
- Never expires
Press pack
$59.00 USD
800 credits
- A series, or a big colouring book
- Never expires
KDP specs
The numbers a book has to hit before Amazon accepts it
These are the settings that cause most first-time rejections. The builder fills them in; the calculators let you check them yourself.
| Spec | Value |
|---|---|
| Trim sizes supported | 5×8 · 5.25×8 · 5.5×8.5 · 6×9 · 7×10 · 8×10 · 8.5×8.5 · 8.5×11 |
| Bleed | 0.125″ on every edge when the design runs to the edge |
| Interior resolution | 300 DPI, CMYK-safe greyscale or colour |
| Spine width | pages × paper thickness (white 0.002252″, cream 0.0025″) |
| Full cover wrap | 0.125 + back + spine + front + 0.125 in |
| Page count | 24–828 paperback; interiors end on an even page |
| Ebook | EPUB 3, plus an editable Word file for the paperback |
How this differs from a generic AI writer
- Files, not just textYou get an interior PDF with bleed, a cover wrap sized to the page count, EPUB 3 and Word — not a docx you still have to lay out.
- Numbers you can checkEvery figure comes from KDP published rates, with the check date shown. The calculators and the builder read the same table.
- No royalty shareYou publish under your own KDP account and keep 100% of your sales.
- Planning is freeOutline, page list and the exact credit quote cost nothing; credits are spent only when you approve.
Questions
Before you start
Yes — no account, no email, no card. They run on one published rate table; the paid part is the book builder, which is not open yet.
Printing cost and royalty rate use KDP's own formulas, checked against its worked examples. Two things to watch: KDP rounds the interior up to an even page count, and each marketplace has its own thresholds and currency.
Run a plan and see an exact quote. It is not enough to finish a book — the smallest build is 45 credits — and we would rather say that here than at checkout.
No. You publish under your own Amazon KDP account and keep 100% of your sales. We charge for making files, not for owning the book.
Five files: a print-ready interior PDF (with bleed when the design needs it), a cover wrap PDF sized to the page count, an EPUB 3, an editable Word file, and a KDP upload checklist that names every setting to choose.
No. The calculators are live; the book builder is still being built, and credits are not on sale yet. When it opens, credits will never expire and unused credits will be refundable within 14 days.
Start with the number you need
Six calculators, one rate table. Every page shows its working and links the official source.