An 8.5×11 book on KDP requires a minimum inside margin of 0.375”–0.875” depending on page count, 0.25” outside margins, embedded fonts, and an even page count. This is US letter size — the largest standard trim KDP supports. Printing costs are significantly higher: a 200-page B&W book costs roughly $5.40, and color interiors jump to $7.40+. Use 8.5×11 for workbooks, cookbooks, children’s picture books, coloring books, coffee table books, and any layout that needs full-page images or wide tables.
When to use 8.5×11
This is not a standard book size — it’s a utility size. Use it when:
- Children’s picture books — full-page illustrations need the space
- Cookbooks — recipes with photos, ingredient columns, and step-by-step layouts
- Workbooks / journals — fillable pages, worksheets, planners
- Coloring books — full-page designs need the 8.5×11 canvas
- Technical manuals — wide code listings, diagrams, schematics
- Art / photography books — portfolio-style layouts
Do not use for: novels, memoir, self-help, or any text-heavy book. The letter-size page produces absurdly wide text lines that are unreadable at normal font sizes. Fiction and narrative nonfiction should use 5.5×8.5 or 6×9.
Minimum inside (gutter) margin
| Page Count | Minimum Inside Margin |
|---|---|
| 24–150 pages | 0.375” |
| 151–300 pages | 0.5” |
| 301–500 pages | 0.625” |
| 501–700 pages | 0.75” |
| 701–828 pages | 0.875” |
Minimum outside margins
| Edge | No bleed | With bleed |
|---|---|---|
| Outside | 0.25” | 0.375” |
| Top | 0.25” | 0.25” |
| Bottom | 0.25” | 0.25” |
Recommended margins for 8.5×11
For image-heavy layouts (cookbooks, children’s books, coloring books), bleed is usually essential — you want images to run to the edge of the page.
| Edge | Text-heavy (workbooks) | Image-heavy (cookbooks, children’s) |
|---|---|---|
| Inside (gutter) | 0.75”–1.0” | 0.75” |
| Outside | 0.6”–0.75” | 0.375” (bleed) |
| Top | 0.6”–0.75” | 0.25” (bleed) |
| Bottom | 0.75”–0.9” | 0.25” (bleed) |
Important for bleed: When bleed is enabled, your PDF page size must be 8.75” × 11.25” (adding 0.125” on each bleed edge). The final trim cuts back to 8.5” × 11”.
Use the KDP Book Calculator to check margin tiers for your page count.
Spine width
Cream paper: page count × 0.0025” White paper: page count × 0.002252”
| Pages | Cream Spine | White Spine |
|---|---|---|
| 50 | 0.125” | 0.113” |
| 100 | 0.250” | 0.225” |
| 150 | 0.375” | 0.338” |
| 200 | 0.500” | 0.450” |
| 300 | 0.750” | 0.676” |
At 8.5×11, books tend to have fewer pages (especially image-heavy layouts). A 100-page coloring book has a very thin spine — no room for text. Calculate yours with the Spine Width Calculator.
Printing cost at 8.5×11
8.5×11 is the most expensive trim to print on KDP. The per-page cost is higher, and color interiors add significantly:
Black and white interior
| Pages | Cost (cream) | Cost (white) |
|---|---|---|
| 50 | ~$2.60 | ~$2.44 |
| 100 | ~$3.20 | ~$2.88 |
| 150 | ~$3.80 | ~$3.32 |
| 200 | ~$5.40 | ~$4.76 |
Color interior (premium color)
| Pages | Cost |
|---|---|
| 50 | ~$5.75 |
| 100 | ~$9.50 |
| 150 | ~$13.25 |
| 200 | ~$17.00 |
Color printing at 8.5×11 gets expensive fast. A 100-page cookbook with full-color photos costs ~$9.50 to print — you’ll need a list price of $24.99+ to maintain a reasonable royalty. Use the KDP Book Calculator for exact cost and royalty at your target price.
Cover dimensions
Cover width = 8.5” + spine + 8.5” + 0.25” = 17.25” + spine Cover height = 11” + 0.25” = 11.25”
Example: 150-page book on white paper
- Spine: 150 × 0.002252” = 0.338”
- Cover width: 17.25” + 0.338” = 17.588”
- Cover height: 11.25”
- At 300 DPI: 5,276 × 3,375 pixels
These are large files — make sure your cover designer works at 300 DPI from the start. Use the Cover Size Calculator.
PDF settings
- Page size: 8.5” × 11” (612 × 792 points) without bleed; 8.75” × 11.25” with bleed
- Fonts: embedded
- Images: 300 DPI minimum (critical for image-heavy layouts)
- Color: select color ink type in KDP dashboard (standard color or premium color)
- Page count: even
KDP’s image quality requirements
For 8.5×11 layouts with images:
- Minimum 300 DPI at print size — a full-page image needs to be 2,550 × 3,300 pixels minimum
- No upscaling — KDP’s review catches low-resolution images that have been upscaled
- JPEG or TIFF embedded in the PDF
- Color images: use sRGB color space for KDP (convert to CMYK only for IngramSpark)
Related specifications
- 8.5×11 on IngramSpark — PDF/X-1a + CMYK requirements
- 6×9 on KDP — for text-heavy nonfiction
- Format a children’s book — genre-specific guide
- KDP Book Calculator — cost and royalty
- Cover Size Calculator — cover dimensions