Pixels Per Inch (PPI) Calculator
Understanding PPI Calculations
Pixels Per Inch (PPI) is calculated using the formula:
PPI = √(Width² + Height²) ÷ DiagonalThis calculation helps determine the pixel density of a display. Higher PPI values mean more pixels packed into each inch, resulting in sharper images and text.
Common PPI Values
| Device Type | Typical PPI Range | Example Devices |
|---|---|---|
| Smartphones | 300-500 PPI | iPhone 15 (460 PPI) |
| 4K Monitors | 140-200 PPI | 27" 4K Monitor (163 PPI) |
| Laptops | 100-200 PPI | MacBook Pro 16" (226 PPI) |
What is Pixels Per Inch (PPI)?
Pixels Per Inch (PPI) measures the pixel density of digital displays, indicating how many pixels are packed into one linear inch of screen space. Higher PPI values mean sharper images and text, crucial for:
- Choosing high-resolution displays
- Graphic design and photo editing
- VR/AR headset displays
- Smartphone screen comparisons
- 4K/8K TV evaluations
How to Use This PPI Calculator
- Enter horizontal pixel count (width)
- Enter vertical pixel count (height)
- Input diagonal screen size in inches
- Click "Calculate PPI" for instant results
Pro Tip: Understanding PPI Values
| Device Type | Typical PPI Range |
|---|---|
| Smartphones | 300-500 PPI |
| 4K Monitors | 140-200 PPI |
| Laptop Screens | 100-200 PPI |
| TV Screens | 50-100 PPI |
Why PPI Matters for Display Quality
Pixel density directly impacts visual clarity. While 300 PPI is considered "retina" quality for smartphones viewed at 10-12 inches, larger screens like TVs have lower PPI requirements due to viewing distance. Our calculator helps you:
- Compare screen resolutions objectively
- Determine optimal viewing distances
- Choose between 4K vs 8K displays
- Understand marketing specifications
PPI Calculator FAQs
Q: What's the difference between PPI and DPI?
Q: What is a good PPI for a monitor?
A: For 24-27" monitors, aim for 90-140 PPI. 4K monitors typically offer 140-200 PPI depending on screen size.