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Calculate and convert aspect ratios for displays and media
| Ratio | Description | Decimal | Examples |
|---|---|---|---|
| 16:9 | Widescreen HD | 1.78 | 1920×1080, 3840×2160 |
| 4:3 | Standard/Classic | 1.33 | 1024×768, 1600×1200 |
| 21:9 | Ultrawide | 2.33 | 2560×1080, 3440×1440 |
| 1:1 | Square | 1.00 | 1080×1080, 2048×2048 |
| 32:9 | Super Ultrawide | 3.56 | 3840×1080, 5120×1440 |
| 3:2 | Classic Photography | 1.50 | 2160×1440, 3000×2000 |
| 5:4 | SXGA | 1.25 | 1280×1024 |
| 16:10 | WUXGA | 1.60 | 1920×1200, 2560×1600 |
| 9:16 | Mobile Portrait | 0.56 | 1080×1920, 1440×2560 |
| 2.35:1 | Cinemascope | 2.35 | 2048×871 |
| 2.39:1 | Anamorphic | 2.39 | 2048×858 |
Aspect ratio is the proportional relationship between the width and height of an image, screen, or video frame, expressed as two numbers separated by a colon (e.g., 16:9). This ratio describes the shape of the viewing area and is fundamental in video production, photography, display design, and digital content creation. The aspect ratio remains constant regardless of the actual size or resolution of the image.
Understanding aspect ratios is crucial for ensuring content displays correctly across different devices and platforms. The most common modern aspect ratio is 16:9 (widescreen), used in HD televisions, computer monitors, and most video content. Different aspect ratios create different viewing experiences, from the cinematic feel of 21:9 ultrawide to the classic look of 4:3 standard definition.
Aspect Ratio = Width ÷ GCD : Height ÷ GCDWhere GCD is the Greatest Common Divisor of width and height.
1920 × 1080: GCD = 120
1920 ÷ 120 = 16
1080 ÷ 120 = 9
Result: 16:92560 × 1080: GCD = 40
2560 ÷ 40 = 64
1080 ÷ 40 = 27
Simplified: 21:9Pro Tip: When creating content, always consider your target aspect ratio to avoid cropping or letterboxing issues.
16:9 is the most common aspect ratio for modern displays, TVs, and video content. It became the standard for HD and 4K content and is used by most streaming platforms.
16:9 is wider (widescreen) while 4:3 is more square (standard). 4:3 was the standard for old TVs and computer monitors, while 16:9 is the modern widescreen format.
16:9 is most common, but 21:9 ultrawide provides more peripheral vision in games. 32:9 super ultrawide offers an even more immersive experience for compatible games.
Black bars (letterboxing) appear when content filmed in one aspect ratio is displayed on a screen with a different ratio. Movies are often shot in 2.35:1 or 2.39:1, wider than standard 16:9 displays.
1:1 (square) is commonly used for Instagram posts, profile pictures, and certain artistic photography. It provides a balanced, centered composition.
Aspect ratio itself doesn't affect quality, but cropping or stretching content to fit a different ratio can degrade quality. Always maintain proper aspect ratios to preserve image integrity.
16:9 is the standard for YouTube videos. The platform displays videos in 16:9 by default, though it also supports vertical (9:16) for Shorts and other aspect ratios.