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Updated for 2026

Aspect ratio is the proportional relationship between a video's width and height — written as width:height. Common formats are 16:9 (landscape, YouTube), 9:16 (vertical, TikTok and Reels), and 1:1 (square, feed posts).

What is video aspect ratio?

By MakeThisVid Editorial Updated Methodology

Aspect ratio determines where a video plays well. 16:9 (1920×1080 at 1080p) is the standard for YouTube, connected TV, and most landscape placements. 9:16 (1080×1920 at 1080p) is required for TikTok, Instagram Reels, YouTube Shorts, and full-screen mobile placements. 1:1 (1080×1080) is the safe square format for Instagram and Facebook feed where the platform may crop other ratios. Generating the wrong ratio means the platform either letterboxes the video or crops critical content out of frame.

How to Use MakeThisVid

From prompt to downloadable MP4, ready to deploy.

  1. Quick definition

    Aspect ratio is the proportional relationship between a video's width and height — written as width:height. Common formats are 16:9 (landscape, YouTube), 9:16 (vertical, TikTok and Reels), and 1:1 (square, feed posts).

  2. Where you encounter it

    If you're researching AI video tools or shipping AI-generated content, you'll see "video aspect ratio" used in pricing pages, feature comparisons, and platform documentation. Knowing what it precisely refers to (and what it doesn't) avoids picking a tool from the wrong category for your workflow.

  3. When to use it vs neighbors

    Pin down whether you actually need this technique for your workflow before picking a tool. The related terms below cover the adjacent categories — checking those first prevents the most common selection mistakes.

Who Uses MakeThisVid for This

Multi-platform campaign

Generate the same scene in 9:16, 16:9, and 1:1 to cover every paid placement from a single prompt.

Repurposing existing assets

Re-export the same source idea in a different ratio rather than re-shooting or re-cropping.

Format testing

A/B test which aspect ratio drives more pause-rate or completion on each platform.

Frequently Asked Questions

Aspect ratio is the proportional relationship between a video's width and height — written as width:height. Common formats are 16:9 (landscape, YouTube), 9:16 (vertical, TikTok and Reels), and 1:1 (square, feed posts).
9:16 vertical for TikTok, Instagram Reels, YouTube Shorts, and most full-screen mobile placements. 16:9 landscape for YouTube pre-roll, connected TV, and feed video where letterboxing is acceptable. 1:1 square is the safe middle for Instagram and Facebook feed.
MakeThisVid is an AI scene generator with text-to-video and photo-to-video capabilities, audio always on, commercial use licensed on every plan from $19.99/mo, no watermark.

Pick your aspect ratio on MakeThisVid

9:16 for TikTok and Reels, 16:9 for YouTube and pre-roll. Type a prompt and pick the format.

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