Aspect ratio (image)

The aspect ratio of an image is the ratio of its width to its height, and is expressed with two numbers separated by a colon, such as 16:9, sixteen-to-nine. For the x:y aspect ratio, the image is x units wide and y units high. Common aspect ratios are 1.85:1 and 2.40:1 in cinematography, 4:3 and 16:9 in television photography, and 3:2 in still photography. The film was filmed in 2.40:1 widescreen.

Common image aspect ratios
.461538:1 (6:13) Commonly used in modern smartphones
.5625:1 (9:16) Commonly used in mid-late 2010s smartphones
.6:1 (3:5) Commonly used in early 2010s smartphones
.6:1 (2:3) Commonly used in late 2000s smartphones
1:1 Square. Aspect ratio of 6×6 medium format still cameras. Used in some social networks.
1.1875:1 (19:16) Fox Movietone aspect ratio
1.25:1 (5:4) Early televisions, also large (4×5 and 8×10) and medium format (so-called 6×7) still photography
1.33:1 (4:3) Traditional television & computer monitor standard, also classic 35 mm film standard
1.375:1 (11:8) Academy standard film aspect ratio
1.43:1 (143:100) IMAX motion picture film format
1.5:1 (3:2) Classic 35 mm still photographic film
1.55:1 (14:9) Used to create an acceptable picture on both 4:3 and 16:9 televisions
1.6:1 (16:10) A common computer screen ratio
1.6180:1 (${\displaystyle \varphi }$:1) The golden ratio
1.66:1 (5:3) A common European widescreen standard; Paramount format; native Super 16 mm film
1.77:1 (16:9) HD video standard; American & British digital broadcast TV standard
1.85:1 (37:20) A common American widescreen cinema standard
1.90:1 DCI standard for 4K & 2K; Digital IMAX
2.00:1 Univisium
2.20:1 (11:5) Standard 70 mm film Super Panavision
2.370:1 (64:27) Cinematic widescreen "21:9" consumer standard
2.40:1 A current widescreen cinema standard
2.414:1 (δS:1) The silver ratio
2.76:1 (69:25) Ultra Panavision 70
3.5:1 or 3.6:1 (32:9 or 18:5) Super Ultrawide, Ultra-WideScreen 3.6
4:1 Polyvision, consisting of three side-by-side frames of 4:3. Used only in Napoléon (1927)