Video Aspect Ratio Calculator
Visualise how any crop ratio will frame your footage — see the visible area, safe zone and percentage kept. No upload needed.
Reframe with AI face tracking
Bitcut for iPhone automatically centres the crop on the speaker's face as they move — no manual keyframes needed. Plus animated subtitles and HD export.
How it works
Step 1
Set source ratio
Choose your original video format — usually 16:9 for landscape footage.
Step 2
Pick target ratio
Select 9:16 for TikTok/Reels/Shorts, 1:1 for Instagram feed, or any other target.
Step 3
See the crop
The visualiser shows exactly what area will be visible, the percentage used and the inner safe zone.
FAQ
What is a safe zone?
The inner 90% of the visible crop area — stay inside it to keep text, logos and faces away from edges that platforms may cover with UI elements.
How much of my 16:9 video will be visible in 9:16?
A centred 9:16 crop of a 16:9 source uses about 56% of the original width, showing 100% of the height. The left and right edges are cropped out.
Can I change the crop position (not centred)?
This tool shows a centred crop. To shift the crop position in your actual video (e.g. to keep a face on one side), use the Bitcut app which has AI face-tracking reframe.
What ratio should I use for TikTok, Reels and Shorts?
9:16 (vertical) is the standard for all three platforms. Square 1:1 also works well for Instagram feed posts.