PPI Calculator / DPI Calculator

The “PPI Calculator / DPI Calculator” tool is a useful utility for calculating the Pixels Per Inch (PPI) and Dots Per Inch (DPI) of a display device. By inputting the screen diagonal, a unit of measurement (inches, centimeters, or millimeters), and selecting the screen resolution, the tool provides accurate PPI and DPI values.

PPI Calculator / DPI Calculator

PPI Calculator / DPI Calculator Tool

How to Calculate PPI Simple Steps With Formula

Here’s a simple and concise explanation of how to calculate PPI (Pixels Per Inch) with the formula:

  1. Determine the number of pixels along the width or height of the screen, whichever is easier to measure.
  2. Measure the diagonal length of the screen in inches.
  3. Use the following formula to calculate PPI:PPI = Number of Pixels / Diagonal Length in inchesIn this formula, divide the number of pixels by the diagonal length measured in inches.


PPI and DPI are two related but distinct terms used to describe the resolution or pixel density of a display:

  1. PPI (Pixels Per Inch): PPI refers to the number of pixels (individual color dots) that are present per inch on a screen. It measures the pixel density or the level of detail that can be displayed. Higher PPI values generally indicate sharper and more detailed visuals.
  2. DPI (Dots Per Inch): DPI originally referred to the number of dots that a printer could produce per inch on a physical page. However, in the context of digital displays, DPI is often used interchangeably with PPI. In this context, DPI represents the pixel density or resolution of a display device, similar to PPI.

While PPI specifically refers to the number of pixels per inch on a screen, DPI can have broader applications and is often used in the context of printing or scanning devices.