PixelSizes

Screen reference

Common Screen Resolutions

Aspect ratios, megapixels, print sizes and pixel density for 13 common display resolutions, from 1280 × 720 to 8K. All values are calculated from the pixel dimensions.

Resolution, aspect ratio and size

Common labels are shown for orientation; manufacturers do not always use them consistently. “Print at 300 PPI” is the physical size if a screenshot of that resolution were printed at 300 PPI.

Common display resolutions
ResolutionAspect ratioMegapixelsPrint at 300 PPI
HD · 720p1280 × 72016:90.924.27 × 2.4 in
WXGA1366 × 768683:384 (≈16:9)1.054.55 × 2.56 in
WXGA+1440 × 90016:10 (8:5)1.34.8 × 3 in
HD+1600 × 90016:91.445.33 × 3 in
Full HD · 1080p1920 × 108016:92.076.4 × 3.6 in
WUXGA1920 × 120016:10 (8:5)2.36.4 × 4 in
UW-FHD2560 × 108021:9 (64:27)2.768.53 × 3.6 in
QHD · 1440p2560 × 144016:93.698.53 × 4.8 in
WQXGA2560 × 160016:10 (8:5)4.18.53 × 5.33 in
UW-QHD3440 × 144043:18 (≈21:9)4.9511.47 × 4.8 in
4K UHD3840 × 216016:98.2912.8 × 7.2 in
5K5120 × 288016:914.7517.07 × 9.6 in
8K UHD7680 × 432016:933.1825.6 × 14.4 in

Pixel density (PPI) by screen size

Screen PPI = √(width² + height²) ÷ diagonal. A 27-inch 4K panel is much denser than a 27-inch 1440p panel. Use the calculator below for your exact diagonal.

Calculated PPI for a flat panel with square pixels
Resolution13.3 in15.6 in24 in27 in32 in
1280 × 72011094615446
1366 × 768118100655849
1440 × 900128109716353
1600 × 900138118766857
1920 × 1080166141928269
1920 × 1200170145948471
2560 × 108020917811610387
2560 × 144022118812210992
2560 × 160022719412611294
3440 × 1440280239155138117
3840 × 2160331282184163138
5120 × 2880442377245218184
7680 × 4320663565367326275

Calculate your screen’s PPI

Your dimensions

On your device

Illustrative combinations, not specifications for a particular device. Enter your display’s actual measurements below.

Use panel pixels, not a scaled browser viewport.

Use the panel’s native pixel dimensions.

Measure the display area, excluding its bezel.

Use the same unit as the diagonal you entered.

Use a decimal point, without commas. Physical lengths and PPI accept up to 4 decimal places.

Example result

91.79 PPI

1,920 × 1,080 native pixels · 24 in diagonal

Display width × height
20.92 × 11.77 in
Metric dimensions
53.13 × 29.89 cm
Pixel pitch
0.2767 mm
Display proportionsNative pixel area · proportions only
Illustrative geometry · proportions, not actual screen size

Use the display’s native pixel grid and viewable diagonal, excluding its frame.

CSS defines a relationship of 96 CSS px per CSS inch. That relationship is not a measurement of this screen’s physical pixel density.

Calculation details & inputs
Inputs used for this result
Horizontal native resolution1920 px
Vertical native resolution1080 px
Viewable screen diagonal24
Diagonal unitInches (in)
Result details · 6 decimals or 3 significant digits for tiny values
Pixel density (PPI)91.787799
Width (in)20.917813
Height (in)11.76627
Width (cm)53.131245
Height (cm)29.886325
Pixel pitch (mm)0.276725
Megapixels2.0736

Native resolution is not the CSS viewport

Operating systems scale the interface on dense screens. A 3840 × 2160 laptop panel at 200% scaling reports a 1920 × 1080 CSS viewport to the browser, so layout CSS pixels and native panel pixels differ. Use native pixels for screen PPI; use CSS pixels for web layout and the CSS unit converter.

Need a screenshot or wallpaper on paper? Convert its pixel width with the 1920 pixels to inches or 3840 pixels to inches pages, or read can I print a screenshot?