Ppi Calculator
Calculate Pixels Per Inch (PPI) and dot pitch for any display. Enter screen resolution and diagonal size to get the pixel density.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the PPI Calculator
- Enter the horizontal resolution (e.g., 1920 px) in the first field.
- Enter the vertical resolution (e.g., 1080 px) in the second field.
- Enter the diagonal screen size in inches (e.g., 27).
- Click Calculate PPI or press Enter on any field.
Results explained:
- PPI = pixels per inch (higher = sharper).
- Dot Pitch = distance between pixels in mm (smaller = finer detail).
- Total Pixels = width × height (e.g., 1920×1080 = ~2 million).
Note: Use positive integers for resolution and positive numbers for diagonal size. All inputs are required.
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Frequently Asked Questions
PPI stands for Pixels Per Inch. It measures the pixel density of a display, indicating how many pixels are in one inch of the screen.
PPI is calculated using the Pythagorean theorem: PPI = √(width² + height²) / diagonal size, where width and height are the number of pixels horizontally and vertically, and diagonal is the screen size in inches.
Dot pitch is the distance between the centers of two adjacent pixels, typically measured in millimeters. It is the inverse of PPI (25.4 / PPI).
