Screen PPI Calculator
Pixel density and viewing distance.
Enter your values
ⓘ Live results
Results
- Pixel density
- 163.2 PPI
- Dot pitch
- 0.1557 mm
- Retina distance
- 1.76 ft
- Total pixels
- 8,294,400
Quick answer
PPI is the diagonal pixel count divided by the screen's diagonal size in inches.
PPI = √(w² + h²) ÷ diagonal
How to use the Screen PPI Calculator
- 1Enter the horizontal and vertical pixel counts.
- 2Enter the diagonal screen size.
- 3Compare PPI against your viewing distance.
Worked example
Using the values the calculator loads with:
Inputs
- Horizontal pixels3840
- Vertical pixels2160
- Screen size27 in
Results
- Pixel density163.2 PPI
- Dot pitch0.1557 mm
- Retina distance1.76 ft
- Total pixels8,294,400
Frequently asked questions
What PPI looks sharp?
Above 110 PPI for desktop monitors at normal distance.
Is 4K worth it at 24 inches?
Yes for text sharpness, but scaling is usually required.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.