When designing the perfect book cover, you’ll need to factor in the width of the spine.
There are numerous book spine calculators available online to help take the guesswork out of it — but what if you want to just do it yourself? Good news, you’re about to learn how!
What’s needed to calculate spine width?
To calculate spine width, you need to know the final page count and paper weight(s). The more pages in your book, the thicker the spine. If those pages are on a heavier paper, the spine width increases. Conversely, if the paper is lighter weight, the spine width decreases.
Calculating your book’s page count
Calculating your book’s PPI
Once you’ve taken all of the above into consideration, it’s time to choose what paper your book will be printed on, so that you can work out the pages per inch.
Here are some real numbers to work with, based on our most common paper types:
|Royal Palm Press - Paper Stock||Pages per inch (PPI)|
|50# White Inside Pages||535 ppi|
|60# White Inside Pages||440 ppi|
|70# White Inside Pages||376 ppi|
|80# White Inside Pages||324 ppi|
|10pt White Cover||Add .02"|
|12pt White Cover||Add .03"|
Putting the formula to work
[Page Count] divided by [PPI] plus Cover Stock
(186 pages / 440ppi) + .02″ cover = .443″ spine
Need help calculating your spine? Get in touch with us!