Monitor PPI Calculator
Calculate PPI
Calculate pixels per inch from resolution and screen size
Common Resolution PPI
Calculate PPI for a common resolution at a given screen size
Formula
PPI = sqrt(Width^2 + Height^2) / Diagonal (inches) | Dot Pitch = 25.4 / PPI
Frequently Asked Questions
What is a good PPI for a monitor?
For desktop monitors at arm's length (~60cm), 110+ PPI is adequate and 140+ is sharp. Apple's Retina standard is ~220 PPI for laptops. For phones held at ~30cm, 300+ PPI (Retina) makes individual pixels imperceptible. Higher PPI means sharper text and images.
Does higher PPI always mean better?
Higher PPI means sharper individual pixels, but very high PPI on desktops requires scaling (making UI elements larger), which can reduce effective screen real estate. A 4K 27-inch monitor (163 PPI) at 150% scaling gives the workspace of a 1080p monitor but with much sharper rendering.
You may also need
A
Color Depth Calculator
Free color depth calculator. Calculate the number of possible colors, bits per pixel, and memory requirements for different color depth configurations.
ScienceA
Image File Size Calculator
Free image file size calculator. Estimate uncompressed and compressed image file sizes based on resolution, color depth, and format.
ScienceA
Video Storage Calculator
Free video storage calculator. Estimate storage requirements for video recordings based on resolution, codec, frame rate, and duration.
Science