Free KDP calculators
Get the numbers KDP checks before it accepts your paperback. No sign-up, nothing to install.
Every value comes from KDP's help pages, checked 2026-11-13.
CalculatorKDP Cover Size CalculatorFull paperback cover size for Amazon KDP from trim size, paper and page count: width and height with bleed, spine width, pixels at 300 DPI and a free SVG template.CalculatorKDP Spine Width CalculatorSpine width for an Amazon KDP paperback from page count and paper type (white, cream, groundwood, standard or premium color), and whether KDP allows spine text.CalculatorKDP Royalty and Printing Cost CalculatorPaperback royalty per sale on Amazon.com from list price, trim size, ink, paper and page count, with KDP's printing cost, the 50% vs 60% rate and the minimum list price.CalculatorKDP Interior Margin CalculatorMinimum inside (gutter) and outside margins for an Amazon KDP paperback interior by page count, with and without bleed, plus the PDF page size to export.