Pixels Per Inch (PPI) Calculator
Find a screen's pixel density (PPI) and dot pitch from its resolution and diagonal size.
Pixel density
108.79 PPI
- Dot pitch
- 0.2335 mm
- Screen size
- 23.53 × 13.24 in (59.77 × 33.62 cm)
- Total pixels
- 3,686,400 (3.686 MP)
- Pixels per centimeter
- 42.829
Show the work
Diagonal in pixels (Pythagoras)
dpx = √(width to the power of 2 + height to the power of 2)
√(2,560 to the power of 2 + 1,440 to the power of 2) = 2,937.20956
Pixels per inch: divide by the diagonal in inches
PPI = dpx ÷ diagonal
2,937.20956 ÷ 27 = 108.79 PPI
How it works
PPI = √(width px² + height px²) ÷ diagonal in inches; dot pitch = 25.4 mm ÷ PPI
Questions
- How does the pixels per inch (PPI) calculator work?
- PPI = √(width px² + height px²) ÷ diagonal in inches; dot pitch = 25.4 mm ÷ PPI.
- What do I need to enter?
- Width, Height, Diagonal. Optional fields can be left blank.
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