9:16 Dimensions Calculator – Vertical Video Sizes & Safe Zone Overlay

Vertical Presets:

Enter Width or Height

Width (px)

Height (px)

Developer & Creator Code Snippets

CSS / Tailwind / HTML

CSS Property

aspect-ratio: 9 / 16;

Tailwind CSS Utility

aspect-[9/16]

HTML Attribute

<video width="1080" height="1920" style="aspect-ratio: 9 / 16;"></video>

Visual Aspect Preview

9:16 Vertical

Top UI Header Excluded

Caption & Sound Link Excluded

Scale: Relative Proportions 9 × 16

9:16 Calculated Dimensions

9:16 Resolution

1080 × 1920

Decimal Ratio

0.5625

Total Pixels

2,073,600

Megapixels

2.07 MP

9:16 Vertical Video — Dimensions, Safe Zones & Platform Guidelines

9:16 vertical video is the native aspect ratio for smartphone screens and the format required by YouTube Shorts, Instagram Reels, and TikTok. Platform UI elements (action buttons, captions, usernames) overlay the edges, making safe zone planning essential for professional-looking content.

When to use this calculator

Calculate exact export dimensions for a Shorts, Reels, or TikTok video in DaVinci Resolve, Premiere, or CapCut
Visualize platform safe zones before placing text overlays, logos, or call-to-action elements
Convert a horizontal 16:9 video to vertical 9:16 by determining a correct crop region
Verify the minimum resolution requirement for each platform before exporting
Generate the correct CSS or HTML dimensions for a vertical video embed

Mathematical formula

Height = (Width × 16) / 9
Width  = (Height × 9) / 16

Verified platform guidelines

YouTube Shorts: Verified against Official YouTube Creator Documentation (Verified: 2026-07-28). Avoid top 12% and bottom 20%.
Instagram Reels: Verified against Instagram Business Guidelines (Verified: 2026-07-28). Keep key text inside 1080×1350 vertical safe zone.
TikTok: Verified against TikTok Business Help Center (Verified: 2026-07-28). Avoid bottom 24% caption area.

Related tools

For horizontal widescreen video, use the 16:9 Dimensions Calculator. To check your upload dimensions before exporting, use the Aspect Ratio Calculator.

Frequently Asked Questions

Common questions about this tool.

What is the recommended resolution for 9:16 vertical video? ▼

The industry-standard vertical video resolution is 1080×1920 pixels (Full HD 9:16). For 4K vertical displays, use 2160×3840 pixels. All major platforms (TikTok, Instagram Reels, YouTube Shorts) accept 1080×1920 as the optimal upload resolution.

What are vertical video safe zones for YouTube Shorts and Reels? ▼

Safe zones represent the central area of a 9:16 video that is not obscured by platform UI elements (usernames, captions, sound titles, action icons). YouTube Shorts: avoid top 12% and bottom 20%. Instagram Reels: keep key text inside the 1080×1350 vertical safe zone. TikTok: avoid the bottom 24% caption area.

How do you calculate 9:16 height from width? ▼

Multiply width by 16, then divide by 9. Formula: Height = (Width × 16) / 9. For a width of 1080: (1080 × 16) / 9 = 1920 px.

What resolution does TikTok recommend for uploads? ▼

TikTok recommends 1080×1920 (9:16 Full HD) at a minimum. Videos can be up to 10 minutes long for standard videos or 60 seconds for standard Shorts-style content. Higher-resolution uploads (2160×3840) are downscaled but retain quality for users with high-DPI displays.

Can I upload a 4:3 or 1:1 video to a vertical video platform? ▼

Yes, but the platform will letterbox (add black bars on the sides) to fill the 9:16 player frame. To maximize screen real estate and audience retention on mobile, use native 9:16 framing for content intended for Shorts, Reels, or TikTok.