How sharp is the 13.6-inch MacBook Air? Retina PPI explained

How this is calculated

Retina distance for 224 PPI is 15 inches (39 cm), well inside the usable laptop viewing distance. At any normal hand-to-face distance the screen looks completely free of pixel structure, text renders as if printed, and photographs show none of the grain that appears on a 157 PPI 14-inch 1080p panel. This is why Apple's marketing emphasizes "Retina": the density is engineered so you never see a pixel.

Verdict

The 13.6-inch MacBook Air's 2560x1664 Liquid Retina panel delivers 224.51 PPI with a Retina distance of about 15 inches (39 cm), well inside any usable laptop viewing distance. Apple doubles the panel via 2x pixel doubling, so the effective UI grid is 1280x832 but every interface element renders with four physical pixels per logical pixel, which is why text reads as printed output and standard sub-pixel anti-aliasing artifacts disappear. At 224 PPI the panel sits firmly past Apple's Retina standard at any hand-to-face distance, which is the decisive density advantage against the 157 PPI Windows ultrabook baseline. The 224 PPI Retina-class density is what makes the MacBook Air's panel the reference 13-inch laptop display, even before the brightness and color accuracy of the panel itself enter the comparison.