PPI Calculator

PPI 220.53 pixels per inch

Pixel Per Inch Formula:

PPI = Diagonal in pixels/Diagonal in inches.
Using the screen width, height and the Pythagorean theorem, calculate the length of the diagonal in pixels.
ppi calculator

Now, divide the length of the diagonal in pixels by the length of the diagonal in inches.


PPI is a commonly used acronym for Pixels Per Inch. It is basically used as a representation of the measurement of the pixel density of a digital screen. As the name suggests, Pixels Per Inch depicts the number of pixels that can be fitted on a 1-inch line.

This PPI calculator calculates the pixel density or resolution of your screen display on the basis of the screen dimensions and the pixel count.

To calculate the PPI of any display device on this calculator, simply enter the screen width (in Pixels), screen height (in Pixels) and diagonals (in Inch) into the respective fields and click on Calculate button.


When a digital image has a higher PPI, you get to see a much better image with finer details.

PPI Formula

PPI = Diagonal in pixels/Diagonal in inches


Below are the various categories of pixel density (lowest to highest quality)


Low density, 120 PPI


Medium density, 120-160 PPI


Medium High density, 160-213 PPI


High density, 213-240 PPI


Extra High density, 240-320 PPI


Extra Extra High density, 320-480 PPI


Extra Extra Extra High density, 480-640 PPI

FAQs Related to Pixels Per Inch Calculator

How is PPI Calculated?

You can either take the vertical or horizontal resolution. Once you have the resolution, you must measure the diagonal length of the display. Usually, it is measured in inches (2.54 cm = 1 inch). If you divide the two numbers, you'll find the "pixels per inch" (PPI).

What is PPI?

Pixel density is the number of physical pixels per inch on a screen or display of a device. It's often referred to as Pixels Per Inch or PPI.

What is a good PPI?

Images with a higher PPI tends to be of higher quality because it has a greater pixel density, but exporting at 300 PPI is generally considered industry-standard.

What is a good PPI for printing?

The more pixels per inch on a display, the finer the print's detail will be and the more sharp it will look. The value for reasonable print quality is 180 PPI minimum. For a better image, you can go up to 240 Pixels per inch, and for a superior quality, you may have to go up to 300 PPI.

What is a good PPI for a smartphone?

The most significant driver in smartphones and the most critical selling attribute is resolution. Today's highest resolution of a mobile phone on the market is around 440 pixels per inch (PPI). The average is closer to 300 PPI.

What is difference between DPI and PPI?

DPI also known as Dots per Inch refers to the number of printed dots within one inch of an image printed by a printer. PPI or Pixels per Inch refers to the number of pixels contained within one inch of an image displayed on a computer monitor.