Monitor PPI Calculator
Pixels per inch, pixel pitch, and megapixels from a resolution and the panel diagonal.
PPI is the pixel diagonal divided by the panel diagonal. Use the glass size, not the stand. This is sharpness, not perceived quality.
PPI
108.8
3.69 MP · 0.233 mm pixel pitch
Worked example
A 27 inch panel at 2560 × 1440 comes out at about 108.8 pixels per inch, with about 0.233 mm pixel pitch.
FAQ
- How is PPI calculated?
- The pixel diagonal, from the width and height, divided by the physical diagonal in inches.
- Does this use the size on the box?
- Use the glass diagonal, not the stand or the outer frame.
- How is this different from the screen PPI tool?
- This one uses the pixel counts you type. The screen PPI tool multiplies CSS pixels by this device’s pixel ratio.