Size difference
The 28″ 4K has 8% more screen area than the 27″ 4K, and is 0.9″ wider and 0.5″ taller. The 27″ 4K measures 23.5″ × 13.2″ (60 × 34 cm) with a 16:9 aspect ratio. The 28″ 4K measures 24.4″ × 13.7″ (62 × 35 cm) at 16:9. Panel sizes exclude bezels and stands, so allow about 1–3 cm extra on each side.
Sharpness and pixel density
Both have nearly identical pixel density (163 vs 157 PPI), so text looks equally sharp. Individual pixels stop being visible to 20/20 vision beyond about 21″ (54 cm) on the 27″ 4K and 22″ (55 cm) on the 28″ 4K.
Workspace
Both show nearly the same number of pixels (8.3 vs 8.3 MP), so at 100% scaling they fit the same amount of content.
On a Mac
The 27″ 4K: scaling compromise. It is too dense for 1× and not dense enough for a comfortable 2×. Scaled to look like 2560 × 1440, text is softer than on a Retina display; at 2×, the UI looks oversized on a 24″-wide screen. The 28″ 4K: scaling compromise. It is too dense for 1× and not dense enough for a comfortable 2×. Scaled to look like 2560 × 1440, text is softer than on a Retina display; at 2×, the UI looks oversized on a 24″-wide screen.
Why this matters: macOS draws its interface at exactly 1× or 2×, so displays near 110 or 220 PPI look best. Read the Mac monitor guide or how we rate sharpness.
Desk and viewing distance
For comfortable viewing, sit roughly 34″ (86 cm) from the 27″ 4K and 35″ (90 cm) from the 28″ 4K. A desk at least 76 cm deep keeps the larger screen from feeling too close.
Which should you choose?
27″ 4K
Choose the 27″ 4K if your desk is shallow or narrow.
28″ 4K
Choose the 28″ 4K if you want a bigger, more immersive screen.
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Frequently asked questions
How much bigger is the 28″ 4K than the 27″ 4K?
The 28″ 4K has 8% more screen area (335 vs 312 square inches) and is 0.9″ wider.
Which is sharper, the 27″ 4K or the 28″ 4K?
Both have nearly identical pixel density (163 vs 157 PPI), so text looks equally sharp.
Which is better for a Mac, the 27″ 4K or the 28″ 4K?
They fall in the same macOS sharpness class (scaling compromise). It is too dense for 1× and not dense enough for a comfortable 2×. Scaled to look like 2560 × 1440, text is softer than on a Retina display; at 2×, the UI looks oversized on a 24″-wide screen.
Which is better for gaming, the 27″ 4K or the 28″ 4K?
They render nearly the same number of pixels, so the same graphics card performs alike on both. Choose by size, refresh rate and panel type.
Will a 28″ 4K fit on my desk?
Its screen is 24.4″ (62 cm) wide; allow about 1″ (2–3 cm) more for the frame. For comfortable viewing, a desk at least 76 cm (30″) deep works best, or use a monitor arm to push it back.
How far should I sit from a 28″ 4K?
About 35″ (90 cm) is comfortable, so the full screen height stays within a relaxed field of view.
Last updated October 8, 2026. Figures are calculated from panel diagonal and resolution; bezels and stands vary by model.