Laptop calibration reference
MacBook Pro 16-inch (M3 Pro/Max) screen PPI
This laptop reference combines its 3456 × 2234 display, 16.2-inch diagonal, and estimated 254 PPI to give you a faster starting point for online-ruler calibration.
Resolution
3456 × 2234
Screen diagonal
16.2"
Estimated PPI
254
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
External displays, browser zoom, and operating-system scaling can change the effective scale. Treat this as a starting estimate, then confirm with a physical card on the active display.