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Author Toolkit · Free tool

Cover Template Calculator

Get your exact spine width and full-wrap cover canvas, so your cover is sized right the first time and never gets rejected at upload.

Your book

See the full wrap to scale Back cover + spine + front cover, with bleed, the whole canvas you design on. The gold strip is the spine.

Back
Front
1 2 3 4 5

Enter trim size and page count to preview the cover.

Your cover dimensions

Every measurement, numbered

Each number matches the diagram on the left.

Enter your trim size and page count to see your exact canvas size.

Which spec is this? These figures use the Amazon KDP model, the anchor platform. Paper-thickness and bleed values differ slightly on IngramSpark and other printers, and hardcover case-wrap / dust-jacket covers need extra wrap allowance. OW always checks and adjusts final files before upload.

Optional

Send these specs to OW

Want us to design the cover to this exact size? Send your dimensions and we'll take it from here.

Your calculated specs, sent with this form

  • Trim size—
  • Page count—
  • Binding—
  • Interior · paper—
  • Spine width—
  • Full cover size—

We use your details only to prepare your cover quote.

Got it, your cover specs are in

We'll be in touch about designing your cover to size. Prefer to chat? WhatsApp us.

The companion tool

Now set up your interior

Your cover's sorted, the Interior Layout Calculator gives you the right margins, gutter and bleed for the inside of the book.

Open the Interior Calculator → Back to Self-Publishing