How to Calculate PPI for Your Device – Easy Steps with Formula & Examples
What is PPI (Pixels Per Inch) Calculator?
A PPI Calculator helps you instantly determine the pixel density (sharpness) of a screen or display. By entering the pixel width, height, and diagonal size in inches, you quickly find out how many pixels fit in one inch of your device.
This is useful for comparing screen quality of mobiles, laptops, monitors, and TVs. Using the tool is simple, accurate, and avoids manual calculations, saving both time and errors compared to working out PPI by hand.
Formula Behind PPI Calculator
The PPI (Pixels Per Inch) is calculated with the formula: PPI = √(width² + height²) / diagonal (in inches). Here, width and height are in pixels, while diagonal is the screen size in inches. The formula uses the Pythagorean theorem to find the pixel diagonal, then divides by the physical diagonal in inches for accurate pixel density.
PPI Calculator Table for Common Devices
| Device/Resolution | Width (px) | Height (px) | Diagonal (in) | PPI |
|---|---|---|---|---|
| iPhone 14 | 1170 | 2532 | 6.1 | 460 |
| Full HD Laptop | 1920 | 1080 | 15.6 | 141 |
| 4K 55" TV | 3840 | 2160 | 55 | 80 |
| Standard A4 Print | 2480 | 3508 | 11.69 | 409 |
| iPad Pro 12.9 | 2048 | 2732 | 12.9 | 264 |
Steps to Use PPI Calculator
- Enter the screen width in pixels.
- Enter the screen height in pixels.
- Enter the diagonal size in inches.
- Click "Calculate".
- Instantly see accurate PPI and calculation details.
Why Use Vedantu’s PPI Calculator?
With Vedantu's PPI Calculator, you get instant and accurate screen pixel density for any device just by entering a few values. This removes confusion when comparing screen quality across smartphones, monitors, or TVs.
The tool is mobile-friendly, requires no downloads, and avoids calculation mistakes. Whether you're a student, designer, or tech-enthusiast, it's perfect for understanding screen resolution and making better buying or design decisions.
Applications of PPI Calculator
PPI calculation is vital for selecting smartphones, tablets, monitors, or TVs, helping ensure sharp visuals and text for coding, reading, gaming, and studying. It’s also crucial in graphic design and web development for retina-ready assets.
Additionally, printing professionals and photographers use PPI to check image detail for best results. Students can easily link geometry, mathematics, and real-world tech topics with such pixel density tools.
Curious about other maths and conversion tools? Try our Square Footage Calculator or convert measurements using the Inch to CM Calculator. Also, explore concepts like Area of Rectangle or find out more in Geometry Topics.
