KDP Tools — Smart Tools for Amazon KDP & Print-on-Demand Sellers

Tools

Everything You Need for KDP Success

Professional-grade tools designed specifically for self-publishers and print-on-demand sellers.

Cover Calculator

Calculate exact spine width, bleed areas, and total cover dimensions for your KDP paperback.

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Royalty Calculator

Estimate your Amazon KDP royalties and profit margins across multiple marketplaces.

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Keyword Combiner

Generate hundreds of long-tail keyword combinations to boost your book's discoverability.

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HTML Description Formatter

Create beautifully formatted book descriptions with clean HTML optimized for Amazon.

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More Tools

Advanced Tools for Serious Publishers

Go deeper with analytics, pricing optimization, and manuscript preparation tools.

Page Estimator

Convert your word count to estimated printed pages based on trim size, font, and spacing settings.

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Price Optimizer

Compare royalties across different price points to find the sweet spot that maximizes your earnings.

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Readability Analyzer

Analyze your manuscript's Flesch-Kincaid score, reading level, and word frequency for your audience.

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ACOS Calculator

Calculate your Amazon Ads break-even ACOS, ad profitability, and return on ad spend (ROAS).

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Description Generator

Generate highly engineered ChatGPT & Claude prompts to write high-converting Amazon sales descriptions.

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Pen Name & Bio Generator

Discover genre-perfect pen names and generate a professional, ready-to-use Amazon Author Central bio.

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ISBN Barcode Generator

Generate a free, high-resolution ISBN-13 barcode with pricing extensions. No watermarks, 100% free.

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Blog

Latest Tips & Guides

Expert insights to help you grow your print-on-demand business.

March 7, 2026 · 4 min read

Writing Short Books for Amazon KDP: A Smart Publishing Strategy

Learn how to write short books for Amazon KDP and boost your publishing strategy with our expert guide.

Why Publishing Multiple Books on KDP Increases Your Income

Discover why a larger KDP catalog dramatically increases your passive income and visibility on Amazon.

Amazon KDP Royalty Rates Explained: 35% vs 70%

Understand exactly how Amazon KDP royalty rates work and which pricing strategy maximises your earnings.

Start Growing Your KDP Business Today

All tools are 100% free, no sign-up required. Built by self-publishers, for self-publishers.

Try the Cover Calculator →