Professional PPI (Pixels Per Inch) calculator for displays and screens. Calculate pixel density, dot pitch, and screen resolution metrics.
PPI Calculator - Diagonal Method
PPI Calculator - Dimensions Method
About PPI Calculator
This calculator finds the resolution of your display based on its dimensions and the pixel count. PPI (Pixels Per Inch) is a measurement of the pixel density of a screen or digital image.
What is PPI?
PPI stands for Pixels Per Inch and represents the measurement of pixel density of a screen or digital image. The density is measured as the number of pixels that fit on a 1-inch line.
PPI Categories
- LDPI: 120 PPI - Low Density
- MDPI: 120-160 PPI - Medium Density
- TVDPI: 160-213 PPI - Medium High Density
- HDPI/HiDPI: 213-240 PPI - High Density
- XHDPI: 240-320 PPI - Extra High Density
- XXHDPI: 320-480 PPI - Extra Extra High Density
- XXXHDPI: 480-640 PPI - Extra Extra Extra High Density
PPI vs DPI
- PPI (Pixels Per Inch): Used for digital displays and screens
- DPI (Dots Per Inch): Used for printing and physical output
- Key Difference: PPI refers to digital pixels, while DPI refers to physical dots
Applications
- Display Technology: Comparing screen resolutions and quality
- Smartphone Selection: Evaluating device pixel density
- Monitor Comparison: Understanding display sharpness
- Printing: Converting digital images to physical prints
- Web Design: Creating responsive designs for different screen densities
Examples
- iPhone 14: 460 PPI (Super Retina XDR display)
- 4K 27" Monitor: 163 PPI (3840×2160 resolution)
- Full HD 24" Monitor: 92 PPI (1920×1080 resolution)
- Retina MacBook Pro: 227 PPI (13-inch model)
Formulas Used
- Diagonal Pixels: √(width² + height²)
- PPI: Diagonal pixels ÷ Diagonal size (inches)
- Dot Pitch: 1 ÷ PPI
- Total Pixels: Width × Height
Note
This calculator assumes square pixels and provides accurate PPI calculations for most modern displays. For specialized displays with non-square pixels or PenTile matrices, results may vary slightly.