PPI Calculator
Determine the sharpness of your display. By entering the pixel dimensions and physical size of a screen, you can find its density and compare the clarity of different monitors or mobile devices.
What is PPI?
PPI stands for Pixels Per Inch. It is a measurement of the pixel density (resolution) of an electronic image device, such as a computer monitor or smartphone screen.
How do I calculate PPI?
To calculate PPI, use the Pythagorean theorem to find the diagonal resolution in pixels: d_p = √(w² + h²). Then, divide the diagonal resolution by the diagonal screen size in inches: PPI = d_p / d_i.
What is a good PPI for a monitor?
For a standard desktop monitor viewed from 2-3 feet away, 90-110 PPI is considered good. For high-resolution "Retina" displays or smartphones, PPI values often exceed 300-400.
What is the difference between PPI and DPI?
PPI (Pixels Per Inch) refers to the number of pixels on a digital screen. DPI (Dots Per Inch) refers to the number of physical dots of ink on a printed document. They are often used interchangeably but represent different media.