Getting your Amazon KDP cover requirements wrong is one of the fastest ways to have a book rejected — or worse, approved with a blurry spine or clipped text that kills sales before the first click. Whether you're uploading an eBook or sending a print-ready PDF to a paperback, every format has its own set of rules. This guide covers the exact specs for eBooks, paperbacks, and hardcovers so you can build your cover file right the first time.
eBook (Kindle) Cover Requirements
Kindle covers are simpler than print, but the pixel math still matters. Amazon's ideal eBook cover size is 2,560 pixels tall by 1,600 pixels wide, which hits the required 1.6:1 height-to-width ratio perfectly. If you can't work at full size, the minimum accepted dimensions are 1,000 x 625 pixels — but those will look soft on high-DPI screens, so treat them as a floor, not a target. The maximum is 10,000 pixels on any single side.
- Accepted file formats: JPEG (.jpg/.jpeg) or TIFF (.tif/.tiff)
- Maximum file size: under 50MB
- Required color mode: RGB — CMYK files will be rejected
- Aspect ratio: minimum 1.6:1 (height to width)
One practical tip Amazon documents but most authors miss: if your cover has a white or very light background, add a narrow 3–4 pixel border in medium gray around the entire image. Without it, the cover can look like it's floating when displayed against a white product page. It's a small detail that prevents an unprofessional appearance at no design cost.
If you're still working out pricing before you finalize your cover, the KDP Royalty Calculator can help you model royalty scenarios across list prices before you publish.
Paperback Print Cover Requirements
Print covers are a different beast entirely. Your paperback cover must be a single flat PDF containing the back cover, spine, and front cover laid out as one continuous image. This trips up a lot of authors who try to submit just the front panel.
- Maximum file size: 650MB (40MB or less strongly recommended)
- Bleed: 0.125" (3.2mm) on all outer edges — top, bottom, and both sides
- Minimum resolution: 300 DPI
- Color mode: CMYK preferred, specifically US Web Coated SWOP v2 profile
- PDF format: PDF/X-1a:2001 preferred
- Minimum font size: 7-point for any text on the cover
- Text safe zone: all text must sit at least 0.125" (3.2mm) inside the trim lines
The total cover width formula is: Bleed + Back Cover Width + Spine Width + Front Cover Width + Bleed. Total height is: Bleed + Trim Height + Bleed. Spine width is the variable that changes with every book, which is why it gets its own section below.
Pre-Publication Checklist for Print Covers
Before uploading, run through this list. Each item can silently cause a rejection or a degraded print:
- Flatten all transparencies and merge to a single layer
- Embed all fonts — do not outline only; embed as well
- Remove crop marks, registration marks, and color bars
- Remove any remaining template text or placeholder guides
- Remove all spot colors — they are not compatible with KDP's print-on-demand process
- Optimize the PDF to reduce file size
- Remove any file security, passwords, or encryption
Spine Width — The Most Common Mistake
Spine width is calculated differently depending on your paper type, and using the wrong multiplier is the single most common reason a print cover looks broken in proof. You need your final page count, then apply the correct formula:
- Black & White on white paper: page count × 0.002252"
- Black & White on cream paper: page count × 0.0025"
- Color Premium: page count × 0.002347"
- Color Standard: page count × 0.002252"
To put real numbers to this: a 300-page book on cream paper has a spine of 300 × 0.0025" = 0.75". That same book on white paper would be 300 × 0.002252" = 0.6756". That's nearly 0.075" of difference — enough to push spine text outside the safe zone if you used the wrong formula.
Spine text is only permitted when your book reaches at least 79 pages. Keep all spine text at least 0.0625" (1.6mm) from the spine edge, and build in tolerance for production variance of ±0.0625" on either side. If your spine is close to the minimum, center everything and leave as much margin as you can afford.
Amazon provides the KDP Cover Calculator at kdp.amazon.com/cover-calculator. Enter your trim size, page count, and paper type and it outputs a downloadable PDF or PNG template with your exact dimensions already marked out. Use it every time — don't calculate manually and hope your designer got the same number.
Hardcover Cover Requirements
Hardcover cover files follow the same single-PDF structure as paperbacks but add several hardcover-specific measurements you need to account for in your template.
- Cover wrap: the cover extends 0.51" (15mm) past the edge of the front cover and wraps around the case board
- Safe margin: keep all important text and images at least 0.635" (16mm) from the edge of the book
- Hinge gap: leave 0.4" (10mm) between the spine and the safe area on each side — this is the flex point of the cover and anything placed there will distort or be obscured
These hinge and wrap measurements are easy to overlook in a template built for paperback. If you're reusing a paperback cover file for a hardcover edition, those dimensions need to be rebuilt from scratch, not just resized.
Barcode and ISBN Placement
KDP places the barcode automatically on paperback covers in the lower-right area of the back cover. The barcode space is 2" wide by 1.2" tall. You don't upload the barcode separately — but you do need to leave that area free of any background imagery, text, or dark colors that would interfere with scanning. It must sit on a solid, light-colored background.
For hardcover editions, the same barcode sizing applies. Keep the placement area clear and ensure whatever background color you're using in that zone has enough contrast for a clean barcode read.
KDP Cover Calculator Tool
The KDP Cover Calculator at kdp.amazon.com/cover-calculator is the authoritative source for your cover template dimensions. You input your trim size (e.g., 6" x 9"), page count, paper type, and whether it's a paperback or hardcover. The tool outputs a downloadable template as a PDF or PNG with bleed, safe zone, spine, and wrap measurements pre-drawn. This is the file your designer should be working from — not a generic template downloaded from a third-party site that may not reflect current KDP tolerances.
If you're still in the research phase and haven't locked in a niche yet, browse the KDP niche pages or check the KDP how-to guides for more publishing walkthroughs. And once your book is live, the BSR Sales Calculator can translate your book's Best Seller Rank into estimated monthly sales so you can gauge how the cover is performing.
The Pubscout Chrome Extension shows you live BSR, estimated monthly sales, and niche data directly on any Amazon book page — useful when you're studying what's working for other covers in your category before you finalize your own design.
Quick-Reference Spec Table
Here's a summary of the key specs across all three formats:
- eBook: 2,560 x 1,600px ideal | 1,000 x 625px minimum | 10,000px max per side | 1.6:1 ratio | JPEG or TIFF | under 50MB | RGB
- Paperback: Single PDF (back + spine + front) | 300 DPI minimum | 0.125" bleed all sides | CMYK (US Web Coated SWOP v2) | 7pt minimum font | 0.125" text safe zone | 650MB max | no spot colors
- Hardcover: Same PDF structure as paperback | 0.51" wrap | 0.635" safe margin | 0.4" hinge gap | barcode 2" x 1.2" lower-right back
The cover spec details change less often than you might think, but always verify against the official KDP help pages before going to print — especially if you're working from a template someone else built. A rejected cover file on launch day is an avoidable problem.