Calculate PPI | Measure Your Display’s Sharpness 📱

Measure the exact pixel density of your smartphone, laptop, or monitor. Use this calculator to find Pixels Per Inch (PPI) and dot pitch based on your screen resolution and diagonal size.

💡 Why Pixel Density Matters

Is a 27-inch 4K monitor actually "better" than a 32-inch 4K monitor? Mathematically, yes. Higher pixel density results in smoother text and lifelike images because individual pixels become too small for the eye to distinguish. Use this tool to quantify display "crispness" before you buy.

📘 Features & Pro Tips

• Calculate Instantly Enter your width, height (pixels), and diagonal size (inches) to see your results immediately.
• Load Device Presets Quickly pull specs for common displays, including FHD monitors, 4K panels, and flagship smartphone models.
• Check Dot Pitch Measure the physical distance between pixels in millimeters. A smaller dot pitch indicates higher detail.
• Compare Devices Review your recent calculation history to compare multiple screens side-by-side.

🧐 Frequently Asked Questions

What is a "good" PPI? It depends on your viewing distance. For desktop monitors, 100–110 PPI is considered the "sweet spot." For smartphones held closer to the face, 300+ PPI is the gold standard for sharpness.

Does a higher PPI drain more battery? Generally, yes. Driving more pixels requires more GPU power and higher backlight intensity to maintain brightness, though modern LTPO and OLED panels have mitigated much of this drain.

📚 Trivia: PPI vs. DPI

Avoid using these terms interchangeably. PPI (Pixels Per Inch) refers to digital displays. DPI (Dots Per Inch) refers to physical printer ink dots. When discussing the sharpness of a screen, PPI is the only correct technical term.