About KDPToolsPro
We build free, accurate tools that help independent authors publish confidently on Amazon KDP.
7
Free Tools
100%
Free, No Sign-up
1000s
Authors Helped
Why we started KDPToolsPro
Self-publishing on Amazon KDP means juggling trim sizes, bleed, spine width, printing costs and royalty math before you ever design a cover. We got tired of digging through scattered spreadsheets and outdated PDFs, so we built one place with fast, accurate calculators that any author can use for free — no account, no spam, no paywalls.
What we believe
- Publishing tools should be free and open to every author, hobbyist or full-time.
- Accuracy matters — a wrong spine width can ruin a print run.
- Tools should work instantly, on any device, without friction.
Frequently Asked Questions
Are the tools really free?
Yes. Every calculator on KDPToolsPro is 100% free with no registration required.
Are the results guaranteed accurate for KDP upload?
Our formulas follow Amazon KDP's published specifications, but always confirm final dimensions in KDP's own cover calculator before publishing.
Do you store my book data?
No. Calculations run in your browser and nothing you enter is saved on our servers.