Calculate precise crop and pad dimensions for your videos to perfectly fit social media platforms like TikTok, Reels, and YouTube Shorts.
Video will be cropped to fill the screen without black bars. Some edges will be lost.
FFmpeg Command:
An aspect ratio is the proportional relationship between a video's width and height. For example, a standard HD video is 1920 pixels wide and 1080 pixels high, creating an aspect ratio of 16:9. Different social media platforms require different aspect ratios to display videos correctly without black bars.
TikTok, Instagram Reels, and YouTube Shorts natively use a 9:16 vertical ratio. Instagram Feed videos look best at 4:5 to maximize screen real estate, while standard YouTube videos are 16:9. Using our calculator, you can instantly find the precise pixel dimensions to crop or pad your original footage for any platform.
| Platform | Aspect Ratio | Recommended Resolution |
|---|---|---|
| TikTok / IG Reels / YT Shorts | 9:16 | 1080 x 1920 px |
| Instagram Feed | 4:5 | 1080 x 1350 px |
| Instagram Square | 1:1 | 1080 x 1080 px |
| YouTube Standard | 16:9 | 1920 x 1080 px |
FFmpeg is the industry standard command-line tool for video processing. Our calculator automatically generates the exact FFmpeg `-vf` (video filter) command required to crop or pad your video. You can simply copy and paste this command into your terminal to batch process videos without losing quality through traditional video editing software.
Input the width and height of your original video in pixels.
Select a preset ratio (e.g., 9:16 for TikTok/Reels or 16:9 for YouTube).
Select whether to crop or pad the video and copy the generated FFmpeg command.
Cropping fills the target aspect ratio by removing the outer edges of the video. Padding preserves the entire video by scaling it to fit and adding black bars (letterboxing/pillarboxing) around the empty areas.
The standard aspect ratio is 9:16 (1080 x 1920 pixels). It is a vertical format that covers the entire mobile screen.
FFmpeg uses video filters (-vf) to apply crop or pad filters. The generated command runs instantly in your terminal to process video files without re-encoding quality loss.
Yes, our video aspect ratio calculator is 100% free, runs entirely in your browser, and requires no registration or software installation.