Bookrevenuecalc.com models what a book actually earns across platforms — KDP, IngramSpark, Apple Books, Draft2Digital, and more — once royalty rates, printing costs, and platform fees are accounted for. Most authors have a rough sense of their royalty percentage but rarely see the full per-copy and annual math side by side.
We built this after noticing how often authors compare platforms using headline royalty rates alone, without factoring in print cost deductions or delivery fees that change the real number significantly. Seeing $6.93 per copy next to $3.50 per copy for the same book, on different platforms, changes decisions.
This calculator is part of the IndieOwner family of free tools from Officina Systems, built for self-published and hybrid authors who want their numbers in one place.
Questions or feedback about this tool? Reach us at hello@officinasystems.com.