Check my cover

Tools for self-published authors

Get your book's numbers right the first time.

Exact cover dimensions, spine widths, margins and royalties for print-on-demand books on Amazon KDP, IngramSpark and Lulu, paperback and hardcover. Free, with no sign-up.

Calculate cover sizeCheck my cover
  • Files never leave your browser
  • KDP paperback and hardcover
  • IngramSpark spines measured, not guessed
  • Lulu paperback and hardcover spines
12.926 inSPINE · 0.676 inThe Long TideBackSpineFront
6 × 9 in paperback, 300 pages on white paper, with 0.125 in bleed.

Covers

Full-wrap dimensions, spine width, templates and pre-upload checks.

Amazon KDP

Kindle Direct Publishing paperbacks and hardcovers
Paperback Cover SizeFull-wrap cover dimensions, spine width and a downloadable 300 DPI template.Hardcover Cover SizeCase-laminate cover size with wrap, boards, hinge and spine, plus a 300 DPI template.Spine WidthSpine width for any page count and paper, and whether spine text is allowed.Cover CheckerDrop in your cover export to check its size, DPI and safe zones. Nothing is uploaded.

Lulu

Lulu paperbacks and hardcovers
Paperback Cover SizeLulu paperback cover dimensions for all 15 trim sizes, with a 300 DPI template.Spine WidthLulu paperback spine formula and the hardcover spine table, for any page count.Cover CheckerDrop in your Lulu cover export to check its size, spine, DPI and safety margin.

IngramSpark

IngramSpark paperbacks, with measured spine widths
Paperback Cover SizeIngramSpark paperback cover size with a spine measured from IngramSpark’s own calculator.

Interiors & pricing

Set up your manuscript, then price it so every sale earns.

Amazon KDP

Interior MarginsPage size, gutter and outside margins to set in Word, Affinity or InDesign.Royalties & Print CostPrinting cost, paperback and Kindle royalties, and the minimum list price.

Lulu

Interior MarginsPage size with or without bleed, the 0.5 in safety margin and the gutter for your page count.

Guides

Quick answers to the print questions that trip authors up.

IngramSpark spine width: the real numbersMeasured IngramSpark spines for White 50 and Creme, and why the KDP formula is 5–15% off.Why was my KDP cover rejected?The 10 most common reasons KDP rejects a paperback cover, and how to fix each one.KDP paperback vs hardcover cover sizeWhy a hardcover cover is bigger, what wrap and hinge mean, and side-by-side sizes.KDP vs Lulu spine widthWhy the same book needs a different cover on each platform, with a comparison table.

Cover sizes by trim

Full-wrap dimensions at every page count, for each platform and binding.

KDP paperback17 trim sizes
5 × 8 in5.06 × 7.81 inB-format5.25 × 8 in5.5 × 8.5 inDigest6 × 9 inUS Trade6.14 × 9.21 inRoyal6.69 × 9.61 inPinched Crown7 × 10 inExecutive7.44 × 9.69 inCrown Quarto7.5 × 9.25 in8 × 10 in8.25 × 11 in8.27 × 11.69 inA48.5 × 11 inUS Letter8.25 × 8.25 inSmall Square8.5 × 8.5 inSquare8.25 × 6 inLandscape
Open the KDP paperback cover calculator →
KDP hardcover5 trim sizes
5.5 × 8.5 inDigest6 × 9 inUS Trade6.14 × 9.21 inRoyal7 × 10 inExecutive8.25 × 11 in
Open the KDP hardcover cover calculator →
Lulu paperback15 trim sizes
4.25 × 6.875 inPocketbook5 × 8 inNovella5.5 × 8.5 inDigest5.83 × 8.27 inA56 × 9 inUS Trade6.14 × 9.21 inRoyal6.63 × 10.25 inComic Book7 × 10 inExecutive7.44 × 9.68 inCrown Quarto7.5 × 7.5 inSmall Square8.27 × 11.69 inA48.5 × 8.5 inSquare8.5 × 11 inUS Letter9 × 7 inSmall Landscape11 × 8.5 inUS Letter Landscape
Open the Lulu paperback cover calculator →
IngramSpark paperback15 trim sizes
5 × 8 in5.06 × 7.81 inB-format5.25 × 8 in5.5 × 8.5 inDigest5.83 × 8.27 inA56 × 9 inUS Trade6.14 × 9.21 inRoyal6.69 × 9.61 inPinched Crown7 × 10 inExecutive7.5 × 9.25 in8 × 10 in8.25 × 11 in8.268 × 11.693 inA48.5 × 11 inUS Letter8.5 × 8.5 inSquare
Open the IngramSpark paperback cover calculator →