Video Aspect Ratios: From HD to Vertical for Every Platform

Video Aspect Ratios: From HD to Vertical for Every Platform

Video aspect ratios vary by platform. A YouTube landscape video runs at 16:9. An Instagram Reel is 9:16 vertical. A TikTok is 9:16. A Facebook feed video is 4:5 portrait. A LinkedIn post is 1.91:1. Each platform has different dimension requirements, different player behavior when dimensions do not match, and different penalties for uploading at the wrong ratio. Picking the wrong ratio wastes export time and degrades quality through unnecessary resampling.

This guide covers the ratios used by major platforms as of 2026, the pixel dimensions for each, and what happens when your source footage does not match the platform target. Most professional workflows start from a master at the widest ratio, usually 16:9 or even wider, and crop or pad down to each platform's requirements. Use the CapyToolkit aspect ratio calculator to find the exact crop dimensions from your source frame before you start editing.

Horizontal video ratios: 16:9, 1.85:1, and 2.39:1

Sixteen-to-nine at 1920×1080 is the minimum standard for all major streaming platforms. YouTube accepts up to 4K (3840×2160) at 16:9. Cinematic formats like 1.85:1 and 2.39:1 appear in theatrical film, where the actual DCI pixel dimensions range from 1998×1080 at 2K to 4096×1716 at 4K for CinemaScope content.¹

Letterbox calculations for cinema formats on 16:9 screens

These cinema formats display with letterbox bars on 16:9 screens: at 1920 pixels wide, 2.39:1 content is only 803 pixels tall, leaving 138-pixel bars per side. At 4K resolution (3840 pixels wide), the same CinemaScope content is 1606 pixels tall, leaving 277-pixel bars per side. The CapyToolkit letterbox calculator computes these exact bar dimensions for any source ratio and target resolution, which saves time when planning multi-format deliveries. Filmmakers mastering for both cinema and streaming often provide separate versions: a 2.39:1 cut for theatrical and a 16:9 cut that reframes the shot for home distribution.

Once the bar height is known for a given resolution, the same calculation scales to any width because the ratio difference stays constant. Planning a 2.39:1 theatrical cut alongside a 16:9 home cut from one master therefore means deciding which 138-pixel-class margins you can spare at each size. The CapyToolkit letterbox calculator returns the exact values so you can lock the safe area before rendering the delivery masters.

Vertical video: 9:16, 4:5, and 1:1

Vertical video formats dominate mobile-first platforms, with TikTok and YouTube Shorts requiring 9:16 at 1080×1920 as their native delivery format for short-form content.² Instagram Reels use 9:16 at 1080×1920 in the Reels player, while the feed prefers 4:5 at 1080×1350 because it displays taller than 1:1 while remaining shorter than full-screen 9:16.

Platform-specific behavior for non-standard ratios

Feed posts at 1:1 (1080×1080) work universally across all platforms, though they use less screen real estate than 4:5.³ A 9:16 video uploaded to YouTube as a standard video plays in the 16:9 desktop player with 840-pixel pillar bars per side on 1920 pixels wide. Understanding these platform-specific behaviors prevents wasted export time and avoids unexpected cropping when content appears in places you did not anticipate.

Platform compatibility and crop zones

Each platform applies different crop logic when uploaded dimensions do not match the player. YouTube adds black bars to maintain the source ratio in its 16:9 player. Instagram crops center-square from any non-1:1 upload for the feed thumbnail. TikTok places 16:9 landscape uploads inside a 9:16 player, adding bars above and below while leaving the sides unused. Yet LinkedIn treats 16:9 uploads as standard and plays them without modification in its feed. Knowing each platform's behavior lets you design safe zones for motion graphics, subtitles, and calls to action so they remain visible regardless of how the platform crops or pads the frame.

Multi-platform export workflows in professional NLEs

DaVinci Resolve, Premiere Pro, and Final Cut Pro all support exporting to multiple aspect ratios from a single timeline, but the workflow differs in each. In DaVinci Resolve, create your master timeline at the widest ratio (typically 16:9 at 3840×2160), then use the Deliver page's "Duplicate Timeline" feature to create 9:16 and 1:1 versions with separate crop settings. Premiere Pro's "Auto Reframe" feature detects the subject in the frame and automatically crops to a target ratio, but it requires manual review because the auto-crop sometimes cuts off subjects at the edges.

Setting up export presets for multi-platform delivery

Final Cut Pro uses a similar approach: create a compound clip at the master ratio and apply a crop effect for each target ratio. For creators who publish to YouTube (16:9), TikTok (9:16), and Instagram (4:5) from the same master, the standard workflow is to edit once at 4K 16:9, then export three versions with different crops. The CapyToolkit calculator shows the exact pixel dimensions for each crop so you can set up your export presets correctly.

DCI 4K versus UHD 4K: the 1.90:1 cinema standard

Digital Cinema Initiatives (DCI) 4K is 4096×2160, a 1.90:1 ratio slightly wider than the 16:9 UHD standard of 3840×2160. DCI 4K is the native resolution for digital cinema projectors and for mastering films intended for theatrical release. When a DCI 4K master is delivered to streaming services, it is typically cropped to UHD 4K (3840×2160) by removing 128 pixels from the width. This crop is usually centered, but some DCI masters include a "safe area" specification that indicates where the essential action sits within the wider frame.⁴ Netflix accepts DCI 4K masters and performs the crop internally.

Amazon Prime Video requires UHD 4K delivery.⁵ If you are producing content that may have a theatrical run, shoot and master at DCI 4K and let the streaming services handle the crop. If your content is streaming-only, UHD 4K is the more efficient choice because it avoids rendering 128 pixels per line that will be discarded. The CapyToolkit calculator confirms the ratio difference: 4096/2160 = 1.90 versus 3840/2160 = 1.78.

When to use this

Use this when preparing video exports for multiple platforms from a single master. Preview each platform's crop zone from your source frame before editing, so you know exactly which parts of the shot each platform cuts before you commit to a camera angle or graphic placement.

Examples