Free Amazon KDP tools

Explore the best free Amazon KDP tools to work out your royalties, page count and Kindle Unlimited pay, and make an ISBN barcode.

Navid Moazzez built every one of them, and they also help you write and format your Amazon book description.

Updated Sept 27, 2026

Book royalty calculator

What you earn per copy at KDP, Apple Books, Kobo, B&N, Google Play and Audible.

KDP royalty calculator

Your Amazon KDP royalty for eBook, paperback and hardcover, with the price where it jumps.

Book profit calculator

When your book pays for itself: costs in, break-even out, at your own sales pace.

Book ROI calculator

What a book is worth to your business: royalties plus the clients it brings.

Book page count calculator

Your page count at a real trim, font and margins, with spine width and printing cost.

Words to pages calculator

How many pages your words make, in 10 book fonts and 6 trim sizes.

Book length calculator

How long bestsellers in your genre are, how your book compares, and when you'll finish.

KENP calculator

What Kindle Unlimited pays per full read of your book and per month, beside a sale.

ISBN barcode generator

A print-ready ISBN barcode with its price code, as SVG, PDF or PNG, scan-checked.

Book title generator

Title ideas shaped like your genre's bestsellers, tested against KDP's rules and books that have them.

Book subtitle generator

Subtitles that state your book's promise, at the length your genre's bestsellers use.

Book description generator

3 Amazon book descriptions from your pitch, each checked against KDP's rules.

Amazon book description formatter

Format your book description for Amazon, Editorial Reviews, Kobo or Barnes & Noble, checked and previewed.

Book outline generator

A chapter-by-chapter outline from a proven structure, with word targets, as Word or Markdown.

Book royalty calculator

What you earn per copy at KDP, Apple Books, Kobo, B&N, Google Play and Audible.

KDP royalty calculator

Your Amazon KDP royalty for eBook, paperback and hardcover, with the price where it jumps.

Book profit calculator

When your book pays for itself: costs in, break-even out, at your own sales pace.

Book ROI calculator

What a book is worth to your business: royalties plus the clients it brings.

Book page count calculator

Your page count at a real trim, font and margins, with spine width and printing cost.

Words to pages calculator

How many pages your words make, in 10 book fonts and 6 trim sizes.

Book length calculator

How long bestsellers in your genre are, how your book compares, and when you'll finish.

KENP calculator

What Kindle Unlimited pays per full read of your book and per month, beside a sale.

ISBN barcode generator

A print-ready ISBN barcode with its price code, as SVG, PDF or PNG, scan-checked.

Book title generator

Title ideas shaped like your genre's bestsellers, tested against KDP's rules and books that have them.

Book subtitle generator

Subtitles that state your book's promise, at the length your genre's bestsellers use.

Book description generator

3 Amazon book descriptions from your pitch, each checked against KDP's rules.

Amazon book description formatter

Format your book description for Amazon, Editorial Reviews, Kobo or Barnes & Noble, checked and previewed.

Book outline generator

A chapter-by-chapter outline from a proven structure, with word targets, as Word or Markdown.

Book royalty calculator

What you earn per copy at KDP, Apple Books, Kobo, B&N, Google Play and Audible.

KDP royalty calculator

Your Amazon KDP royalty for eBook, paperback and hardcover, with the price where it jumps.

Book profit calculator

When your book pays for itself: costs in, break-even out, at your own sales pace.

Book ROI calculator

What a book is worth to your business: royalties plus the clients it brings.

Book page count calculator

Your page count at a real trim, font and margins, with spine width and printing cost.

Words to pages calculator

How many pages your words make, in 10 book fonts and 6 trim sizes.

Book length calculator

How long bestsellers in your genre are, how your book compares, and when you'll finish.

KENP calculator

What Kindle Unlimited pays per full read of your book and per month, beside a sale.

ISBN barcode generator

A print-ready ISBN barcode with its price code, as SVG, PDF or PNG, scan-checked.

Book title generator

Title ideas shaped like your genre's bestsellers, tested against KDP's rules and books that have them.

Book subtitle generator

Subtitles that state your book's promise, at the length your genre's bestsellers use.

Book description generator

3 Amazon book descriptions from your pitch, each checked against KDP's rules.

Amazon book description formatter

Format your book description for Amazon, Editorial Reviews, Kobo or Barnes & Noble, checked and previewed.

Book outline generator

A chapter-by-chapter outline from a proven structure, with word targets, as Word or Markdown.

Book royalty calculator

What you earn per copy at KDP, Apple Books, Kobo, B&N, Google Play and Audible.

KDP royalty calculator

Your Amazon KDP royalty for eBook, paperback and hardcover, with the price where it jumps.

Book profit calculator

When your book pays for itself: costs in, break-even out, at your own sales pace.

Book ROI calculator

What a book is worth to your business: royalties plus the clients it brings.

Book page count calculator

Your page count at a real trim, font and margins, with spine width and printing cost.

Words to pages calculator

How many pages your words make, in 10 book fonts and 6 trim sizes.

Book length calculator

How long bestsellers in your genre are, how your book compares, and when you'll finish.

KENP calculator

What Kindle Unlimited pays per full read of your book and per month, beside a sale.

ISBN barcode generator

A print-ready ISBN barcode with its price code, as SVG, PDF or PNG, scan-checked.

Book title generator

Title ideas shaped like your genre's bestsellers, tested against KDP's rules and books that have them.

Book subtitle generator

Subtitles that state your book's promise, at the length your genre's bestsellers use.

Book description generator

3 Amazon book descriptions from your pitch, each checked against KDP's rules.

Amazon book description formatter

Format your book description for Amazon, Editorial Reviews, Kobo or Barnes & Noble, checked and previewed.

Book outline generator

A chapter-by-chapter outline from a proven structure, with word targets, as Word or Markdown.

Browse the best free Amazon KDP tools

15 tools

Book royalty calculator

What you earn per copy at KDP, Apple Books, Kobo, B&N, Google Play and Audible.

KDP royalty calculator

Your Amazon KDP royalty for eBook, paperback and hardcover, with the price where it jumps.

Book profit calculator

When your book pays for itself: costs in, break-even out, at your own sales pace.

Book ROI calculator

What a book is worth to your business: royalties plus the clients it brings.

Book page count calculator

Your page count at a real trim, font and margins, with spine width and printing cost.

Words to pages calculator

How many pages your words make, in 10 book fonts and 6 trim sizes.

Book length calculator

How long bestsellers in your genre are, how your book compares, and when you'll finish.

KENP calculator

What Kindle Unlimited pays per full read of your book and per month, beside a sale.

ISBN barcode generator

A print-ready ISBN barcode with its price code, as SVG, PDF or PNG, scan-checked.

Book title generator

Title ideas shaped like your genre's bestsellers, tested against KDP's rules and books that have them.

Book subtitle generator

Subtitles that state your book's promise, at the length your genre's bestsellers use.

Book description generator

3 Amazon book descriptions from your pitch, each checked against KDP's rules.

Amazon book description formatter

Format your book description for Amazon, Editorial Reviews, Kobo or Barnes & Noble, checked and previewed.

Book outline generator

A chapter-by-chapter outline from a proven structure, with word targets, as Word or Markdown.

Writing prompt generator

Writing prompts for fiction, memoir, nonfiction and posts, or from your own book's outline.