Hardcover · White · 319 pages — spine 0.7487″
For a 5.5 × 8.5 in hardcover with white interior pages, the KDP-spec cover is 13.5687 × 9.5200 in (spine 0.7487″ / 19.02 mm). Tweak any field below to recalculate live.
Spine width
0.7487in
19.02 mm
- Full cover
- 13.5687 × 9.5200 in
- Other unit
- 344.64 × 241.81 mm
Send these specs to your designerOpenClose
Pre-filled message you can paste into email, Slack, or a designer brief. Includes a link back to this exact spec.
Embed this calculator on your site
<iframe src="https://kdpcover.pro/embed/widget?theme=light"
width="100%" height="640" style="border:0; border-radius:12px"
loading="lazy" title="KDP Cover Calculator"></iframe>
<script>window.addEventListener("message",function(e){
if(e.data && e.data.type==="kdpcover:height"){
var f=document.querySelector('iframe[src*="kdpcover.pro/embed/widget"]');
if(f) f.style.height=e.data.height+"px";
}
});</script>Skip the layout
Get a print-ready template with the 0.7487″ spine pre-set
Every KDP-spec paperback and hardcover dimension — one bundle, one download.
Try a similar page count
Same format, paper, and trim — different page count. Each link is its own pre-computed page.