Enter monitor specs to compare actual sizes and resolutions side by side
PPI (Pixels Per Inch) is the number of pixels packed into one inch of screen. Higher PPI means sharper text and images. Typical PC monitors range 90–110 PPI, while 4K monitors reach 140–220 PPI.
By PPI, a 27" QHD is about 109 PPI and a 32" 4K is about 138 PPI. The 32" 4K wins on pixel density, but perceived sharpness also depends on viewing distance.
A 21:9 monitor is about 31% wider than a 16:9 at the same diagonal. It's great for multitasking and movies, but the screen height is lower for the same inch measurement.
Monitor size is the diagonal measurement of the display panel in inches, excluding the bezel. It's measured from the top-left corner to the bottom-right corner of the visible screen.
No. The physical dimensions (cm) are determined by the diagonal inches and aspect ratio. Resolution only affects how many pixels fit into that physical size, expressed as PPI.
When buying a monitor, the most important factors are the actual physical screen size and pixel density (PPI). You need to consider inches, resolution, and aspect ratio together for the best choice.
Even at the same 27 inches, a 16:9 and 21:9 monitor have different physical width and height. A 21:9 ultrawide is wider but shorter, so the screen area can be similar or even smaller. When choosing a monitor, check the actual width and height in cm, not just the inches.
PPI measures pixel density — higher means sharper. However, at greater viewing distances, lower PPI still appears sharp. At typical PC viewing distances (50–70 cm), 100+ PPI is sufficient. 4K monitors at 140+ PPI deliver extremely crisp visuals.