Calculate pixels per inch for any screen, or convert between pixels, inches, centimetres, and millimetres.
| Device | Resolution | PPI |
|---|---|---|
| iPhone 15 Pro | 2556 × 1179 | 460 |
| iPhone 15 | 2556 × 1179 | 460 |
| Samsung Galaxy S24 Ultra | 3088 × 1440 | 500 |
| MacBook Pro 14" (M3) | 3024 × 1964 | 254 |
| MacBook Pro 16" (M3) | 3456 × 2234 | 254 |
| iPad Pro 13" | 2752 × 2064 | 264 |
| Dell 27" 4K Monitor | 3840 × 2160 | 163 |
| Full HD 24" Monitor | 1920 × 1080 | 92 |
| Apple Studio Display 27" | 5120 × 2880 | 218 |
PPI (Pixels Per Inch) is a measure of pixel density — how many pixels are packed into each inch of a display. A higher PPI produces sharper, crisper images. It is calculated by dividing the diagonal pixel count (derived from the width and height resolution) by the physical diagonal screen size in inches.
The formula is: PPI = √(width² + height²) / diagonal_inches. Apple's Retina displays are typically 220+ PPI — a density high enough that individual pixels are not distinguishable at normal viewing distances.
Use the Calculate PPI tab to find the pixel density of any screen — from phones to monitors. Use the Convert tab to translate pixel values to real-world physical measurements (inches, centimetres, millimetres) for a given display's PPI.
All calculations happen entirely in your browser. No data is sent to any server.
Yes, PPI Calculator is completely free to use on UtilityCove.
No. PPI Calculator runs in your browser, so your input stays on your device.
Yes. PPI Calculator works on modern mobile and desktop browsers.
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