15 Free Interactive Book Publishing, KDP Royalty & Print Calculators
Instant, zero-signup calculators for authors, KDP self-publishers, coaches, agencies, and academic researchers—engineered by ArteBook Studio.
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KDP + Wide2026 Store Formulas
Turn Any Blueprint or Guide Into a Finished Book TodayStart free ($0 collaborative studio) or unlock 600 monthly AI credits for $14.99/mo with 100% royalties.
Are the Amazon KDP royalty and spine width formulas updated for 2026?
Yes. Our calculators model current KDP 70%/35% digital bands, 60% paperback royalties minus per-page print costs, white (0.002252 in) and cream (0.0025 in) spine calipers, and mirrored gutter margin rules.
How do I move from a calculator estimate into writing my actual book?
Click "Open ArteBook Studio" on any calculator to launch the free Starter Studio ($0) or Creator ($14.99/mo, 600 credits) and turn your outline into a finished Print PDF, EPUB 3.0, and DOCX book.