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Calculate exact dimensions for your Amazon KDP book cover including spine width, bleed, and total wrap size. Supports both paperback and hardcover books.
Total number of pages in your book
Enter your book specifications and
click Calculate to see results
Choose between Paperback or Hardcover. This affects the calculation method.
Input your book width and height. Common sizes: 6"×9", 5"×8", 8.5"×11".
Enter total pages in your book. This determines spine width.
Select white or cream paper. Different paper types have different thickness.
Click Calculate to see your complete cover dimensions including spine and bleed.
No manual calculations or spreadsheet formulas needed. Get instant, accurate dimensions.
Incorrect cover dimensions are a top reason for KDP rejections. Our calculator ensures compliance.
Precise measurements ensure your cover looks professional when printed.
No signup, no credit card, no hidden fees. Use it as many times as you need.
This calculator is specifically designed for Amazon KDP requirements. It uses the official KDP spine width formulas and includes the required 0.125" bleed on all sides. Whether you're publishing your first book or your fiftieth, accurate dimensions are critical for acceptance.
Typical specs: 5"×8" or 6"×9" trim, 200-400 pages, cream paper for easy reading
Typical specs: 6"×9" trim, 100-300 pages, white paper for images and diagrams
Typical specs: 8.5"×11" trim, 100-200 pages, white paper for writing space
Typical specs: 8"×10" or 8.5"×8.5" square, 24-48 pages, white paper for color
Typical specs: 5"×8" trim, 80-150 pages, cream paper for elegant look
Enter your trim size (width × height), page count, and paper type into the calculator. It will automatically calculate the total cover dimensions including spine width and bleed. For example, a 6"×9" book with 100 pages on white paper will have a spine width of approximately 0.225 inches.
Spine width depends on your page count and paper type. White paper uses 0.002252 inches per page, while cream paper uses 0.0025 inches per page. Our calculator automatically computes this for you based on Amazon KDP specifications.
Amazon KDP requires 0.125 inches (1/8 inch) of bleed on all sides of your book cover. Our calculator automatically includes this in the total dimensions.
The most popular KDP trim sizes are 6"×9" (standard non-fiction), 5"×8" (novels), 8.5"×11" (workbooks), and 5.5"×8.5" (digests). All of these are supported by the calculator.
Yes! Select "Hardcover" in the book type dropdown. Hardcover calculations use different specifications than paperback books.
No, our calculator does all the math for you. Just enter your book specifications and get instant, accurate results compliant with KDP requirements.
Your cover should be 300 DPI at the calculated dimensions. Our full KDP cover creator automatically handles this for you.
You've got the dimensions. Now create a professional, print-ready KDP cover with our AI-powered cover creator. Front, back, spine - all done in 2 minutes.