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Common Resolutions
| Name | Resolution | Ratio | Preview |
|---|---|---|---|
| Full HD (1080p) | 1920 × 1080 | 16:9 | |
| 4K UHD | 3840 × 2160 | 16:9 | |
| HD (720p) | 1280 × 720 | 16:9 | |
| QHD (1440p) | 2560 × 1440 | 16:9 | |
| XGA | 1024 × 768 | 4:3 | |
| Vertical HD | 1080 × 1920 | 9:16 | |
| UWFHD | 2560 × 1080 | 21:9 | |
| Instagram Square | 1080 × 1080 | 1:1 | |
| 24MP Photo | 6000 × 4000 | 3:2 | |
| 5K Ultrawide | 5120 × 2160 | 21:9 |
Click any row to load those dimensions
How Aspect Ratios Work
An aspect ratio describes the proportional relationship between width and height. It's written as width:height (e.g., 16:9 means 16 units wide for every 9 units tall).
The ratio is simplified by dividing both dimensions by their greatest common divisor (GCD). For example, 1920×1080 simplifies to 16:9 because both are divisible by 120.
For a deeper dive including social media requirements, print ratios, and resizing formulas, see our full guide on aspect ratios explained.
Common Use Cases
- 16:9 — Standard for HD/4K TVs, monitors, and YouTube videos
- 4:3 — Classic TV format, still used in presentations
- 1:1 — Square format popular on Instagram
- 9:16 — Vertical video for TikTok, Reels, and Stories
- 3:2 — Standard 35mm photography ratio
- 21:9 — Ultrawide monitors and cinematic content
- 2.39:1 — Anamorphic widescreen cinema format
FAQ
What aspect ratio is 1920×1080?
1920×1080 is 16:9. Both numbers are divisible by 120 (1920÷120 = 16, 1080÷120 = 9). This is the standard Full HD resolution used by most monitors, TVs, and streaming services.
What's the difference between 16:9 and 1.78:1?
They're the same ratio expressed differently. 16:9 uses whole numbers, while 1.78:1 shows the decimal equivalent (16÷9 ≈ 1.778). Cinema often uses decimal notation (like 2.39:1) because it avoids awkward large whole numbers.
What aspect ratio should I use for social media?
Instagram: 1:1 (feed), 4:5 (portrait post), 9:16 (Stories/Reels). YouTube: 16:9 (standard), 9:16 (Shorts). TikTok: 9:16. Twitter/X: 16:9 or 1:1. Facebook: 1.91:1 (link preview), 4:5 (feed). Pinterest: 2:3. LinkedIn: 1.91:1 (post image). Using the wrong ratio means your content gets cropped automatically.
What is 4:5 aspect ratio used for?
4:5 (portrait) is the tallest ratio Instagram allows in feed posts without cropping. At 1080×1350 pixels, it takes up more vertical screen space than 1:1 (square), which gives your post more visibility in the feed. It's also commonly used for portrait-oriented advertising.
Why does my image look stretched?
Stretching occurs when content is displayed at a different aspect ratio than it was created in. For example, playing a 4:3 video fullscreen on a 16:9 monitor will stretch it horizontally. To fix this, either crop the content to the target ratio, add black bars (letterboxing/pillarboxing), or use the "fit" display mode instead of "fill."
How do I maintain aspect ratio when resizing?
Multiply or divide both dimensions by the same factor. For example, to scale 1920×1080 to a 1280px width: scale factor = 1280÷1920 = 0.667, new height = 1080×0.667 = 720. Result: 1280×720, still 16:9. Most editing software has a "lock aspect ratio" toggle that does this automatically.
What is the difference between resolution and aspect ratio?
Resolution is the total number of pixels (e.g., 1920×1080 = 2,073,600 pixels). Aspect ratio is the shape (e.g., 16:9). Multiple resolutions share the same ratio: 1280×720, 1920×1080, and 3840×2160 are all 16:9 but at different resolutions.
What aspect ratio do most phones use?
Modern smartphones typically use ratios taller than 16:9 — commonly 19.5:9 or 20:9. These taller screens fit more content vertically while keeping the phone narrow enough to hold. Standard video content (16:9) gets letterboxed on these screens, which is why vertical 9:16 video fills the full display.
What aspect ratio should I use for printing photos?
Standard print sizes use different ratios: 4×6 inches = 3:2, 5×7 inches = 7:5, 8×10 inches = 5:4. Since most cameras shoot at 3:2, a 4×6 print uses the full frame while an 8×10 print requires cropping from the sides.
How do I find the aspect ratio of an image I already have?
Check the image properties (right-click → Properties on Windows, Get Info on macOS) to find pixel dimensions. Then enter the width and height above — this tool calculates the simplified ratio automatically. For a deeper explanation, see our guide on how aspect ratios work.
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Aspect Ratio Visualizer FAQ
What aspect ratio is 1920×1080?
1920×1080 is 16:9. Both numbers are divisible by 120 (1920÷120 = 16, 1080÷120 = 9). This is the standard Full HD resolution used by most monitors, TVs, and streaming services.
What's the difference between 16:9 and 1.78:1?
They're the same ratio expressed differently. 16:9 uses whole numbers, while 1.78:1 shows the decimal equivalent (16÷9 ≈ 1.778). Cinema often uses decimal notation (like 2.39:1) because it avoids awkward large whole numbers.
What aspect ratio should I use for social media?
Instagram: 1:1 (feed), 4:5 (portrait post), 9:16 (Stories/Reels). YouTube: 16:9 (standard), 9:16 (Shorts). TikTok: 9:16. Twitter/X: 16:9 or 1:1. Facebook: 1.91:1 (link preview), 4:5 (feed). Pinterest: 2:3. LinkedIn: 1.91:1 (post image). Using the wrong ratio means your content gets cropped automatically.
What is 4:5 aspect ratio used for?
4:5 (portrait) is the tallest ratio Instagram allows in feed posts without cropping. At 1080×1350 pixels, it takes up more vertical screen space than 1:1 (square), which gives your post more visibility in the feed.
What is the difference between resolution and aspect ratio?
Resolution is the total number of pixels (e.g., 1920×1080 = 2,073,600 pixels). Aspect ratio is the shape (e.g., 16:9). Multiple resolutions share the same ratio: 1280×720, 1920×1080, and 3840×2160 are all 16:9 but at different resolutions.
How do I maintain aspect ratio when resizing?
Multiply or divide both dimensions by the same factor. For example, to scale 1920×1080 to a 1280px width: scale factor = 1280÷1920 = 0.667, new height = 1080×0.667 = 720. Result: 1280×720, still 16:9.
What aspect ratio do most phones use?
Modern smartphones typically use ratios taller than 16:9 — commonly 19.5:9 or 20:9. These taller screens fit more content vertically while keeping the phone narrow enough to hold. Standard 16:9 video gets letterboxed on these screens.
How do I find the aspect ratio of an image I already have?
Check the image properties (right-click → Properties on Windows, Get Info on macOS) to find pixel dimensions. Then divide both numbers by their greatest common divisor (GCD), or use an aspect ratio calculator to find it automatically.