Paper & Price Calculators

Pages per Inch Calculator

Inching towards your printing goals? Our paper calculator can speed things up!

Our Pages per Inch calculator represented by our converting character


Estimate the number of pages per inch of paper (PPI), based on the sheet’s thickness (caliper).

2 / Caliper = Pages per Inch (PPI)

The pages per inch (PPI) for 100# gloss coated cover with an average caliper of .0095 inches per sheet is: 2 / .0095 = 211 PPI


What is Pages Per Inch and What Does It Measure?

So, you’ve landed on our pages per inch calculator and now you are wondering what it’s for. Pages per inch, as you may have guessed, tells you how many pages fit within a stack of pages that is one inch tall. Why does that matter? Most often, this measurement allows printers to figure out the thickness of a stitched book based on the thickness of one sheet of the type of paper they are using. If you are a book printer trying to decide which paper you need to buy for printing your book, knowing the PPI will help you determine how it will impact the binding aspect of your finished book.

Pages per inch can be abbreviated PPI, but keep in mind that this abbreviation can also refer to Pixels per inch, a measure of image resolution that is important in digital design and printing. We’re a paper company whose customers include commercial printers, so our PPI calculator is for determining pages per inch as you plan which paper you want to order.

How Our Pages per Inch Calculator Can Help You

Using our pages per inch calculator can help you figure out which of our products fit your needs best. In particular, if you are printing a book, knowing the PPI of the papers you are considering can help you to understand how your stitched book will turn out and compare which type of paper will give you the result you want. Our calculator can simplify the calculations to make the process easier for you.

How Do I Calculate Pages Per Inch?

You can use our calculator, and here’s how! To calculate PPI, you need to use the paper’s caliper, which is the measure of paper thickness. This makes sense, since pages per inch is based on the thickness of the paper. On our calculator above, just input your caliper in points, and then click, “Calculate” to get your result. That’s all there is to it! Easier than plugging in a USB cable the right way on the first try.

By the way, if you also need to know your paper’s caliper, we have a helpful caliper table to help with that! As we mentioned, caliper is the measure of paper thickness (and it’s even named after the device that can measure it!) That’s definitely an important measurement to accurately understand when planning what paper you want for your printing project.

What if I want to do the math myself?

If you’re one of those math people, firstly, that’s awesome! Secondly, on our calculator above, you can click “Show Formula,” which is written in red above “Caliper.” When you do that, you’ll see that the formula for PPI is 2 Divided by Caliper = Pages per Inch (PPI). That’s not too tough to calculate by hand, but we want to make sure that the non-math people can also get the PPI info they need! Afterall, we believe everyone deserves a smooth paper process.

Frequently Asked Questions about Pages per Inch

Talking about paper is one of our favorite things to do, so let us answer all your PPI questions!

How many pages are in an inch of paper? How many sheets of paper is 1 inch? 

These questions sound about the same, but in different words. Unsurprisingly, both of these questions have the same answer: it depends! The caliper of a sheet of paper determines its pages per inch or PPI, which is the measure of how many pages are in a stack that is 1 inch high. Different papers have different calipers, they have different pages per inch measurements. Try putting the caliper of a few different papers into our PPI calculator and see what results you get!

What is the best PPI for books?

Even though this looks like a question about pages per inch for the paper for printing books, it could also be a question about pixels per inch as a measure of resolution for printing. Our PPI calculator is pretty amazing, but it only calculates pages per inch. If you came by for pixels per inch, still feel free to take a look around (never know what helpful info you may find)! 

If you are wondering what is the best pages per inch measurement for the book you plan to print, it depends on how thick you want the binding of your final book to be. Once you know that, try calculating the PPI of various papers to determine what will give you the result you want.

I’m so grateful for this pages per inch calculator. Where do I send my thank you card?

What a lovely and definitely real frequently asked question! Now we’re blushing. We’re Case Paper, a premium paper company with over eighty years of history. When our customers have questions, we have answers. Our motto is to always be “On the Case” for our customers. That’s why we provide paper calculators for all types of paper calculations! We also have a sheetload of additional paper resources for you; you’ll never be bored or uninformed about paper again! Any questions, comments or feedback you have can be sent to our team through our Contact Us page…thank you’s are also welcome there 🙂

Case Paper Has the Perfect Paper for Your Printing Project

As a paper company that prioritizes our customers’ experience, we’re so glad you found our pages per inch calculator, and we hope it helped you get an idea of which paper you want to order. A calculator just makes life easier and that’s exactly what we love to do for our customers in all aspects of their paper purchase planning process. Perfect! You know we had to get one more P in there. 

The next step is to reach out to a Case Paper representative, so you can get your order priced out for you. Your representative can answer any additional questions you have and make sure that you order exactly what meets your needs. Remember that even if you have an idea of the price and quantity that you need, only your Case Paper representative can confirm that information with definitive answers and quotes. Don’t hesitate to get in touch with us. We can’t wait to be “On the Case” for you!