PPI / Pixel Density Calculator
PPI (Pixels Per Inch) measures screen resolution density — how many pixels fit in one linear inch of a display. Higher PPI means sharper text and images. Apple branded 326+ PPI as 'Retina' — the point where individual pixels become indistinguishable at normal viewing distance.
💡
Pro Tip
For printing: 300 DPI (dots per inch) is the standard for photo quality. Web images are typically 72–96 PPI — they look sharp on screen but print blurry when enlarged.
⭐
Did You Know?
The human eye can distinguish individual pixels at about 1 arcminute of visual angle. At 12 inches, this works out to ~300 PPI — hence Apple's Retina threshold. Sitting further from a screen makes lower PPI look acceptable.
References
🔒
100% Miễn phí
Không cần đăng ký
✓
Chính xác
Công thức đã xác minh
⚡
Tức thì
Kết quả khi nhập
📱
Sẵn sàng di động
Mọi thiết bị