--- title: "9:16 aspect ratio, plus 4:5 and 1:1, explained | Bang AI" description: "The 9:16 aspect ratio is the tall, full-screen shape of TikTok, Reels and Shorts. What 9:16, 4:5 and 1:1 mean, and how Bang AI exports each shape." url: "https://morebangers.com/glossary/aspect-ratio/" updated: 2026-11-01 --- > Index of every page: https://morebangers.com/llms.txt Video editing glossary # Aspect ratio (9:16, 4:5, 1:1) Published November 1, 2026 · Updated November 1, 2026 An aspect ratio is a video's shape, written as width to height. The 9:16 aspect ratio is tall: nine units wide for every sixteen high, the full-screen shape of TikTok, Instagram Reels and YouTube Shorts, usually 1080 by 1920 pixels. 4:5 is a slightly shorter tall shape for feed posts, 1:1 is the square, and 16:9 is the wide shape of a TV. Bang AI, the AI video editor for people who talk to the camera, exports 9:16, 4:5 and 1:1 from one edit with Export Pack on iPhone and the Mac. [Get started](https://app.morebangers.com/) Bang AI is on iPhone, the web and the Mac. ## In plain words The shape of a video: how wide it is compared with how tall. 9:16 is tall like a phone screen, 1:1 is square and 16:9 is wide like a TV. ## The technical detail The proportional relationship of frame width to height, expressed as W:H. Vertical short-form video is 9:16 (commonly 1080 × 1920 pixels), feed video 4:5 (1080 × 1350) or 1:1 (1080 × 1080), and landscape video 16:9 (1920 × 1080). Converting between ratios crops or pads the frame. ## Related terms - [Burned-in captions](https://morebangers.com/glossary/burned-in-captions/) - [Animated captions](https://morebangers.com/glossary/animated-captions/) ## Reading the two numbers The first number is always the width and the second the height, so the ratio tells you the shape, not the size. A 9:16 video at 720 by 1280 pixels and one at 1080 by 1920 have the same shape; the second is just sharper. - **9:16**: tall, fills a phone held upright. 1080 by 1920 is the common size. - **4:5**: tall but shorter, 1080 by 1350. It fills most of a phone screen inside a feed. - **1:1**: square, 1080 by 1080. - **16:9**: wide, 1920 by 1080, the shape of a TV or a laptop screen. ## Which shape goes where Each place you post has a shape it shows best, and a video in the wrong one gets bars or a crop. - **9:16** for TikTok, Reels, Shorts and stories, where the video fills the screen. - **4:5** for a feed post on Instagram or Facebook, where it sits between other posts and still fills most of the screen. - **1:1** for places that show a square, and for some ad placements. - **16:9** for a YouTube video watched on a laptop or TV. For UGC, 9:16 is the default, and the other shapes are copies made from it. ## Film tall once, cut every shape Going from a tall frame to a shorter one keeps the width and loses height, from the top and the bottom. So if you film upright and keep what matters near the middle, the same recording works in every tall shape and the square. - Hold the phone upright, at eye level, with your face in the upper middle of the frame. - Leave space above your head and below your chin. - Hold products up at chest height, not at the very bottom of the frame. - Keep important things off the edges, where a 1:1 crop cuts most. On iPhone, the Camera tab's rail has Grid and Safe zone to help you frame while filming. ## Safe zones inside the tall frame Filling the screen doesn't mean every pixel is seen. TikTok, Reels and Shorts lay their buttons, captions, names and progress bar over the edges of a full-screen video, mostly along the bottom and the right side. That makes the outer strips of a 9:16 frame the riskiest place for text. Keep captions and on-screen lines inside the central area. The free [safe-zone checker](https://morebangers.com/tools/safe-zone-checker/) shows where each platform covers your frame, and [burned-in captions](https://morebangers.com/glossary/burned-in-captions/) explains why captions need to sit clear of those strips. ## Shapes in Bang AI On iPhone and the Mac, [Export Pack](https://morebangers.com/help/export-pack/) in a version's menu makes six videos at once: 9:16, 4:5 and 1:1, each with captions burned in and without. They are named after the version, such as "Serum launch · 4:5", and you can tap a tile to leave out a shape you won't use. On the web you export one shape at a time. Pick it in the editor's Format tool, 9:16, 4:5, 1:1 or 16:9, then press Export, and repeat for each shape you want. Exporting costs no credits on any device. ## Shape mistakes that show - Filming sideways and posting a wide video into a tall feed, which leaves thick bars above and below. - Stretching a video to fit a shape, so faces look wide or thin. - Putting text at the very top or bottom of a 9:16 frame, where the 4:5 and 1:1 copies cut it off. - Mixing clips filmed upright and sideways in one video. - Exporting at a low resolution, which looks soft on a full phone screen even in the right shape. ## Questions, answered. **Is 9:16 the same as 1080x1920?** 1080 by 1920 is one size in the 9:16 shape, and the most common. 720 by 1280 is the same shape at a lower resolution. **Should I post 4:5 or 9:16 on Instagram?** Use 9:16 for Reels and stories, which fill the screen. Use 4:5 for a feed post, where a tall shape covers more of the screen than a square does. **Can I turn a 9:16 video into a square one?** Yes. A square keeps the full width and loses height from the top and bottom, so keep what matters near the middle while you film. **Can Bang AI export 16:9?** On the web, the Format tool includes 16:9 alongside 9:16, 4:5 and 1:1. Export Pack on iPhone and the Mac makes the three tall and square shapes. **What resolution should a 9:16 video be?** 1080 by 1920 is the usual target for short-form video. In the iPhone and Mac apps, Bang AI offers 720p, 1080p or 4K and starts you on 1080p. An export stays at 720p until Bang AI can reach the clips' original files. **Why does Export Pack make copies without captions?** Some platforms add their own captions, and a clean copy lets you post there without two sets of words on screen. ## Related - [**Export Pack** How Bang AI exports your video: Export Pack's six shapes with and without captions, one-video settings, where files save and full-quality exports.](https://morebangers.com/help/export-pack/) - [**Burned-in captions** Burned-in captions are part of the picture, so they show on every app and can't be turned off. How they differ from caption files, and when to use them.](https://morebangers.com/glossary/burned-in-captions/) ## Keep reading - [Video editing glossary](https://morebangers.com/glossary/) - [Punch-in](https://morebangers.com/glossary/punch-in/) - [Safe-zone checker](https://morebangers.com/tools/safe-zone-checker/) - [Bang AI captions](https://morebangers.com/help/captions/) - [Caption style examples](https://morebangers.com/examples/caption-style-examples/) - [Bang AI for Mac](https://morebangers.com/mac/) ## One edit, every shape. Bang AI is on iPhone, the web and the Mac. [Get started](https://app.morebangers.com/)