Paper stock
Cream vs white paper spine width differences
Small paper-thickness differences become visible across hundreds of pages.
Why cream and white paper stocks can produce different spine widths for the same page count.
Paper choice changes thickness
Two books with the same page count and trim size can need different spine widths if the paper thickness differs. This is why the calculator exposes paper thickness rather than only asking for page count.
- Use a printer-specific paper thickness when available.
- Do not reuse a white-paper cover file after switching to cream paper.
- Recheck cover spread if changing color interior options.
Compare before final cover design
If you are unsure which paper option you will use, run both estimates before committing to spine text or full cover artwork. The difference can be enough to affect centered elements.
- Save both estimates in the cover brief.
- Choose the final stock before exporting print-ready files.
- Check a generated platform template before upload.
Paper comparison example
| Setup | Paper thickness | Estimated 250-page spine |
|---|---|---|
| White paper | 0.095 mm/page | 23.75 mm |
| Cream paper | 0.115 mm/page | 28.75 mm |
| Color paper | 0.13 mm/page | 32.5 mm |
Always confirm final cover dimensions with your printer or POD platform.
Worked examples
150 pages, 6 x 9 in A planning estimate for a 150-page paperback at a 6 x 9 in trim. 200 pages, 6 x 9 in A planning estimate for a 200-page paperback at a 6 x 9 in trim. 250 pages, 6 x 9 in A planning estimate for a 250-page paperback at a 6 x 9 in trim. 300 pages, 6 x 9 in A planning estimate for a 300-page paperback at a 6 x 9 in trim.