Monitor calibration reference
Apple Studio Display screen PPI
This monitor reference combines its 5120 × 2880 display, 27-inch diagonal, and estimated 218 PPI to give you a faster starting point for online-ruler calibration.
Resolution
5120 × 2880
Screen diagonal
27"
Estimated PPI
218
How the PPI reference is calculated
PPI is the diagonal pixel count divided by the physical diagonal in inches: sqrt(width² + height²) / diagonal inches. The result is rounded to the nearest whole pixel per inch.
This value is a screen specification reference, not a promise that your browser will render one CSS inch at the same physical size.
Calibrate on this device
Make sure this is the active display and that browser zoom is 100%. Resolution modes and operating-system display scaling make a physical-reference check essential.