Spine width calculator page. We will provide a template with the measurements and spine width for dust jacket, cover, and / or cover wrap
A spine width calculator page for estimates. Before we can provide you with the measurements, we first need to know exactly how many pages are in the book, and determine the paper thickness and finish. If you have questions you can contact us at (425) 603-1777, or by email through our Contact page. Note: We will provide the spine width for you or your designer, as well as the cover or cover wrap printing dimensions. Files are ideally set-up in InDesign.
Spine Width Calculator / Calculation Formula
PPI (Page Per Inch) counts determine spine width
The spine width estimate is important so that the graphic designer knows what size to make the title on the spine.
Example Formulas:
Soft Cover
Divide the page count by the PPI noted in the charts below. Add 0.03″ to allow for gathered signatures, cover and glue. Example for 184 page book printed on 140 gsm matte art: 184 pages divided by 348 ppi equals 0.53″ plus 0.03″ equals a spine width of 0.56″.
Hardcover
Add thickness of front and back boards. Gloss is thinner than the same weight of matte.
Matte Art — (Coated)
- 80 gsm = 651 ppi
- 100 gsm = 546 ppi
- 120 gsm = 454 ppi
- 140 gsm = 348 ppi
- 180 gsm = 282 ppi
Gloss Art — (Coated)
- 80 gsm = 726 ppi
- 100 gsm = 605 ppi
- 120 gsm = 535 ppi
- 140 gsm = 405 ppi
- 180 gsm = 332 ppi
Wood Free — (Uncoated)
- 80 gsm = 552 ppi
- 100 gsm = 462 ppi
- 120 gsm = 552 ppi
- 140 gsm = 552 ppi
- 180 gsm = 552 ppi
The spine width calculator formula is approximate. Wee provide a template when you print books with us. The spine width calculator is based on the particular printing partner or bindery that we are using. This chart provides a close enough estimate for preliminary artwork. See this handy fractions, inches, MM conversion chart.
Call (844) 603-1777 toll-free, or (425) 603-1777 in the Seattle area. You can request a quote today!
