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Screen PPI Calculator

Calculate pixels per inch and approximate pixel pitch from resolution and screen diagonal.

✓ Method reviewed · 2026-08-22
CALCULATORWhat is the pixel density of a monitor or phone?

Results are for information and preliminary estimation. For critical technical work, manufacturer data, local codes and qualified professional review take precedence.

CALCULATION ENGINEPPI · R1.5.1Engine and route QA: PASS · Method and limits visible
Trust & methodology →
1Enter real inputs
2Press Calculate
3Read result with assumptions
Method & assumptions

How is it calculated?

PPI = √(horizontal² + vertical²) / diagonal inches. Pixel pitch ≈ 25.4 / PPI mm.

Example

Example: A 27-inch 2560×1440 display is about 108.8 PPI.

What questions does this tool answer?

  • What is the pixel density of a monitor or phone?
  • How is Screen PPI calculated?
  • What inputs are needed for Screen PPI?
WHAT CHANGES THE RESULT

Check these before using the estimate

Computer and network tools provide practical capacity planning. Vendor limits, protocol overhead, codecs and real connection quality can move results away from theoretical values.

  • Difference between vendor peak values and real average load
  • Protocol, codec, compression and network overhead
  • Hardware compatibility and transient power/performance spikes
  • Temperature and connection quality that affect real-world efficiency
FAQ

Frequently asked questions

Does higher PPI always mean better image quality?+

It affects sharpness, but panel quality, viewing distance and scaling also matter.

Is PPI the same as DPI?+

PPI describes display pixels; DPI usually describes print dots.