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Put a cover calculator on your site
A free widget for author websites, writing blogs and publishing courses. Your readers get exact KDP and Lulu cover dimensions, spine width and a PDF template without leaving your page.
Preview
Frequently asked questions
Is the widget free?
Yes. Paste the code into any page that allows HTML: WordPress (Custom HTML block), Squarespace (Code block), Wix (Embed HTML), Ghost, Webflow or plain HTML.
Does it slow down my site?
No. It loads lazily inside an iframe from our servers, so it only loads when a reader scrolls to it, and it never touches the rest of your page.
Is my readers’ data collected?
No. All calculations run in the reader’s browser. The widget has no ads, no tracking cookies and no sign-up.