Video size and aspect ratio calculator for every platform

How to use the calculator

1. 1

   Choose the placement

   TikTok, Instagram Reels, Stories or feed, Facebook Reels, YouTube Shorts, X, LinkedIn, Threads, Snapchat or Bluesky.

2. 2

   Enter your video's size

   Width and height in pixels, or tap a common size such as 1920 × 1080 (a horizontal phone or camera video).

3. 3

   Pick crop or bars

   The calculator shows how much of the picture you lose if you crop to fill the frame, and how much of the frame is empty if you fit the whole video.

The short answer: 1080 × 1920, 9:16

For TikTok, Reels, Shorts, Stories, Snapchat, Threads and Bluesky the format is the same: vertical 9:16, ideally 1080 pixels wide and 1920 high, saved as MP4 with H.264 video and AAC audio. Export once at that size and the same file works on all of them, as long as the length suits the strictest one you post to.

The exceptions are feed videos. On Instagram and Facebook feeds, and on LinkedIn, a 4:5 portrait video (1080 × 1350) takes up more of the screen than a square one without being cropped in the grid. YouTube's regular videos are still horizontal 16:9.

What aspect ratio means

The aspect ratio is the shape of the frame: width compared with height. 9:16 means 9 units wide for every 16 high, a tall rectangle; 16:9 is the same rectangle turned on its side; 1:1 is a square; 4:5 is a slightly tall rectangle. The resolution is how many pixels fill that shape: 1080 × 1920 and 720 × 1280 are both 9:16, the first one sharper.

When the shape of your video and the shape of the placement differ, the platform has to do something: crop the edges, or add bars. It is always better to decide that yourself before uploading, which is what the calculator is for.

Crop or bars: which to choose

Cropping fills the screen, which is what short-video feeds reward, but it cuts away the sides of a horizontal video. That is fine when the subject is in the middle, a person talking or a product on a table, and bad when the action is spread across the frame.

Fitting with bars keeps everything, but leaves part of the screen empty. If you go that way, use the empty space: a blurred copy of the video behind it, a title at the top and subtitles at the bottom. Many tutorials and podcasts clips on TikTok are made exactly like this.