Free tool
Aspect Ratio Calculator
Free aspect ratio calculator for video creators. Enter width and height, get the simplified ratio plus a match against TikTok, Reels, Shorts, YouTube, X, LinkedIn, and Pinterest standard sizes.
Free with a free account · No watermarks or ads · Built by Clipzing.com
Enter width and height to get the simplified aspect ratio and see which platform sizes it actually matches.
Frequently asked questions
What is the difference between 9:16 and 16:9?
They're inverses. 9:16 is vertical, taller than wide, and it's what TikTok, Reels and Shorts use. 16:9 is horizontal, what YouTube and TV use. A 1920×1080 video is 16:9. Flip the numbers and you have 9:16.
Why does the calculator show a different ratio than my camera settings say?
Cameras show you the marketed ratio, like 16:9 or 4K. The actual pixel dimensions don't always simplify to exactly that. The calculator gives you the mathematically simplified form. 4096×2160, for example, is really 256:135 even though everyone calls it 16:9.
What's the resolution for TikTok and Reels?
The standard is 1080×1920 (9:16). Both platforms accept higher resolutions but display capped to 1080-wide on most devices. Above 1080×1920 you're paying upload bandwidth for resolution viewers don't see.
Can I just stretch a horizontal video to vertical?
Mathematically yes, visually no. Stretching 16:9 to 9:16 distorts faces, and viewers notice within a second and swipe away. Either letterbox it or use an AI re-framer that crops while tracking the subject.
What's the best way to convert 16:9 to 9:16 with the subject in frame?
An AI clip generator with active-speaker tracking handles this automatically. It detects who's speaking and re-crops per frame to keep them centered. Clipzing.com ships this as the default for every clip exported in 9:16.
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These tools polish clips you already have. Clipzing is the part that makes them. Paste a YouTube link and you get vertical clips back, captioned and ready to post. Plans start at $8.33/mo. Cancel anytime.