Aspect ratio reference
3:1 aspect ratio: sizes in pixels and where it is used.
3:1 means 3 units wide for every 1 tall, a decimal of 3. At 1080 pixels wide that is 1080 by 360; at 1920 wide, 1920 by 640. The X (Twitter) header at 1500 by 500 and other wide banner strips.
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- Ratio
- 3:1
- Decimal
- 3
- Most common size
- 1500 x 500
- At 1080 px wide
- 1080 x 360
Landscape or square
3 ÷ 1
Scale 3:1 to any size
The calculator opens at 1500 by 500. Type a new width or height and the other side keeps the 3:1 ratio.
Your dimensions
Scale to a new size
Fill in one side; the other follows the same ratio.
1080 x 360 keeps the 3:1 ratio.
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Make 3 posts freeCommon 3:1 sizes in pixels
Every size below reduces to 3:1. Each links to its own page.
| Size | Megapixels | Type | Used by |
|---|---|---|---|
| 600 x 200 | 0.12 | social | Email Header Image |
| 1500 x 500 | 0.75 | social | X Header |
Where 3:1 is used: X (Twitter), Web and email
About the 3:1 ratio
3:1 is 3 units wide for every 1 tall, a strip 3 times wider than it is high. Its one important home is the X (Twitter) header image at 1500 by 500 pixels, a size that has not changed since 2014. Nothing else in mainstream social uses exactly 3:1, so most people meet the ratio only when they design that header.
The header is shown at different widths on desktop and in the app, and the round profile picture overlaps its lower left corner, so the ratio tells you the shape but not the safe area. On desktop the visible header is closer to the full 3:1 than in the mobile app, which trims the top and bottom slightly. Panoramic photos and email banners are often near 3:1 as well (a 600 by 200 email header is exactly 3:1), and some website hero strips use it.
Cropping 3:1 to 2:1 keeps 67 percent of the width; to 16:9 keeps 59 percent; to 4:1 (the LinkedIn banner) cuts 25 percent of the height, so one strip can serve both headers if the subject sits in the middle 1500 by 375. Common sizes: 1500 by 500, 3000 by 1000, 1200 by 400, 600 by 200 and 1800 by 600.
Questions about 3:1
1500 by 500, the X header size, is the one people search for. 3000 by 1000 gives a 2x export, and 1200 by 400 or 600 by 200 suit email and website banners. Divide the width by 3 for the height: 1800 wide is 600 tall.
Yes. 1500 divided by 500 is exactly 3. X has recommended 1500 by 500 for the header image since 2014, and it still fits both the desktop and app header. Upload a PNG or a high-quality JPG, and keep text out of the lower left where the profile photo sits.
Aspect ratio guides
- All 44 platform sizes
- 1:1 ratio
- 4:5 ratio
- 5:4 ratio
- 3:4 ratio
- 4:3 ratio
- 9:16 ratio
- 16:9 ratio
- 2:3 ratio
- 3:2 ratio
- 1.91:1 ratio
- 4:1 ratio
- 16:10 ratio
- 2:1 ratio
Common resolutions by ratio
Square posts, profile pictures, album art and carousel slides on every platform.
Portrait feed posts on Instagram, Facebook, LinkedIn and Threads.
Landscape twin of 4:5; 8 by 10 inch prints and the 1280 by 1024 monitor.
iPads, compact cameras, old TVs and 4:3 slides; a landscape option in feeds.
Full-screen vertical: Stories, Reels, TikTok, Shorts and phone wallpapers.
HD video, YouTube thumbnails, monitors and TVs; 1920 by 1080 and 1280 by 720.
35mm film and most camera sensors, 4 by 6 inch prints and Surface screens.
Link preview and Open Graph images on Facebook and LinkedIn; 1200 by 628.
Laptop display ratio: 1920 by 1200, 2560 by 1600, 1440 by 900.