9:16 Aspect Ratio Calculator – TikTok, Reels & Shorts

Aspect Ratio Calculator

9:16

Current Aspect Ratio

Quick Select

Custom Input

Width (px)

Height (px)

Ratio Width

Ratio Height

Editing Dimensions — preview reflects exact width × height; ratio is detected from your input.

CSS

aspect-ratio: 16 / 9;

Smart Ratio Simplifier

Enter any resolution to detect its aspect ratio

CSS Code Generator

Production-ready CSS for responsive 9:16 containers:

CSS / HTML

/* Responsive aspect ratio container */
.ratio-box {
  aspect-ratio: 16 / 9;
  width: 100%;
  overflow: hidden;
}

/* With object-fit for images/video */
.ratio-box img,
.ratio-box video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

Live Visual Preview

16:9 1920 × 1080

Preview animates as you calculate

16:9 aspect ratio Landscape 1920 × 1080

For every 16 units of width, the height is 9 units. The longer side is capped at 1920px, so this ratio resolves to 1920 × 1080 — the conventional Full HD size used across most platform presets.

Why 1920 on the long side? It's the standard Full HD reference width/height used by social, video, and screen presets, which keeps Quick Select results consistent with the Platform & Device Presets below.

Platform & Device Presets

Instagram

Post (Square)

1080 × 1080

Instagram

Portrait Post

1080 × 1350

Instagram

Reel / Story

1080 × 1920

TikTok

Vertical Video

1080 × 1920

Snapchat

Story

1080 × 1920

Facebook / X

Link Preview

1200 × 630

Standard Pin

1000 × 1500

Banner

1584 × 396

YouTube

Thumbnail (HD)

1280 × 720

YouTube

1080p Video

1920 × 1080

YouTube / Netflix

4K UHD

3840 × 2160

YouTube

Shorts

1080 × 1920

Twitch

Stream

1920 × 1080

Ultrawide

UWFHD

2560 × 1080

Ultrawide

UWQHD

3440 × 1440

Desktop

Full HD

1920 × 1080

Desktop

2K / QHD

2560 × 1440

Desktop

4K UHD

3840 × 2160

iPad

iPad Retina

2048 × 1536

Ultrawide

UWFHD

2560 × 1080

Samsung

Odyssey Neo G9

5120 × 1440

iPhone 14

Screen

390 × 844

DSLR (24MP)

Full-Frame RAW

6000 × 4000

DSLR

6MP Export

3000 × 2000

4×6" @300DPI

1200 × 800

8×12" @300DPI

2400 × 1600

8×10" @300DPI

2400 × 1920

Micro 4/3

MFT Camera

3000 × 2250

Common 9:16 Resolutions

Resolution	Category	Usage

9:16 Aspect Ratio Calculator — Complete Creator Guide

The 9:16 aspect ratio is the definitive format for vertical video — the dominant way billions of people consume content on mobile devices. TikTok, Instagram Reels, YouTube Shorts, and Snapchat all use 9:16 as their native format. If you create short-form content, this is the most important aspect ratio in your toolkit.

Vertical video was once dismissed as an amateur mistake. Today, 9:16 is the most-watched video format globally by total view time. Smartphones are held vertically 94% of the time, and every major platform — TikTok, Instagram, YouTube, Snapchat, Pinterest — has built a vertical-first content feed. Creators who don't master 9:16 are invisible to the largest and most engaged mobile audiences.

Common Uses

TikTok videos, Instagram Reels, YouTube Shorts, Snapchat Stories, Facebook Stories, Pinterest Idea Pins, mobile-first ads, vertical digital signage.

Supported Platforms

TikTok Instagram Reels YouTube Shorts Snapchat Facebook Stories Pinterest LinkedIn Stories Twitter Fleets

Safe Zone Guide

Safe Zone: TikTok safe zone: keep text/graphics within 1080×1420 px (leave 250px top, 300px bottom clear of UI overlays). Instagram Reels safe zone: 1080×1350 px in center.

Pro Creator Tip

For 9:16 content, shoot at 1080×1920 px or 2160×3840 px (4K vertical). Leave safe zones of 250px top and 300px bottom to avoid UI overlaps on TikTok and Instagram.

CSS Aspect Ratio

CSS

aspect-ratio: 9 / 16;
width: 100%;
height: auto;

Apply this CSS to any element to lock it to the 9:16 ratio. Supported in Chrome 88+, Firefox 89+, Safari 15+, and Edge 88+.

9:16 vs Other Ratios

16:9

Horizontal widescreen; landscape content. Converting 9:16 to 16:9 crops severely — avoid if possible.

4:5

Shorter portrait format used for Instagram feed posts. Less immersive than 9:16 but fits standard feeds better.

1:1

Square format; a compromise between landscape and portrait. Works on most platforms but shows less of vertical scenes.

Best 9:16 Resolutions & Use Cases

Resolution	Format	Best For	Copy
1080×1920	Full HD Vertical	TikTok, Reels, Shorts standard	Copy
720×1280	HD Vertical	Lower bandwidth, Stories	Copy
2160×3840	4K Vertical	High-quality production	Copy
1080×1920	TikTok Optimal	TikTok recommended	Copy
1080×1920	IG Reels	Instagram Reels recommended	Copy
1080×1920	YT Shorts	YouTube Shorts recommended	Copy

How to Use the 9:16 Calculator

Set your canvas to 1080 × 1920 px (9:16)

Keep all critical content in the center safe zone (avoid top 250px and bottom 300px)

Export at H.264 or H.265, 30fps minimum (60fps for action content)

Upload directly from a mobile device or via the platform's web uploader

Looking for horizontal video? The 16:9 calculator covers YouTube, TV, and streaming. For Instagram feed posts, try 4:5 portrait.

Frequently Asked Questions — 9:16

What resolution is 9:16 for TikTok?

TikTok recommends 1080×1920 px at 9:16 ratio. For higher quality, shoot at 2160×3840 (4K vertical). Always ensure your content fits within TikTok's safe zones.

Is 9:16 the same as portrait mode?

Yes. 9:16 is the portrait orientation of the standard 16:9 widescreen ratio — simply rotated 90 degrees. It's optimized for how people naturally hold their phones.

What is the safe zone for TikTok 9:16?

For TikTok, keep key content within the center 1080×1420 px area. The top 250px is covered by the follow button and top bar; the bottom 300px has the caption, audio bar, and action buttons.

Can I convert a 16:9 video to 9:16?

Yes, but you'll need to crop significantly. The best approach is to reframe your shot or use a content-aware crop that follows the subject. If your footage was shot in 16:9, consider adding a blurred background fill to avoid jarring crop cuts.

What fps is best for TikTok?

TikTok supports up to 60fps but displays most content at 30fps. For smooth slow-motion effects, shoot at 60fps or higher. Standard talking-head or tutorial content at 24-30fps is fine.

What is the maximum file size for Instagram Reels?

Instagram Reels supports videos up to 1GB file size and up to 90 seconds duration. Use MP4 format with H.264 codec for best compatibility.

Explore Related Aspect Ratios

What Is an Aspect Ratio? Complete Guide for Creators in 2026

An aspect ratio is the proportional relationship between the width and height of an image, video, or display. It's expressed as two numbers separated by a colon — for example, 16:9 means the width is 16 units and the height is 9 units. The actual pixel dimensions can vary infinitely, but the proportion stays constant.

Why Aspect Ratios Matter for Content Creators

Choosing the wrong aspect ratio is one of the most common mistakes in digital content creation. Upload a 16:9 video to TikTok and it shrinks into a tiny rectangle surrounded by black bars. Post a 3:2 photo to Instagram expecting a natural crop and you'll be surprised by what gets cut. Understanding aspect ratios lets you shoot, edit, and export content that looks exactly right on every platform — and understanding how to convert between them is what separates amateur and professional output.

Platform Aspect Ratio Quick Reference

Platform	Ratio	Optimal Resolution	Use Case
YouTube	16:9	1920×1080 / 3840×2160	Videos & thumbnails
TikTok	9:16	1080×1920	Vertical video
Instagram Reels	9:16	1080×1920	Vertical video
Instagram Post	1:1 / 4:5	1080×1080 / 1080×1350	Feed posts
DSLR Camera	3:2	Varies (6000×4000 typical)	Photography
iPad	4:3	2048×1536 / 2360×1640	Tablets
Ultrawide Monitor	21:9	3440×1440	Gaming & design
Super Ultrawide	32:9	5120×1440	Samsung Odyssey

How to Calculate Aspect Ratio from Pixels

To find the aspect ratio of any resolution, divide both width and height by their Greatest Common Divisor (GCD). For 1920×1080: the GCD is 120. Divide: 1920÷120=16, 1080÷120=9. Result: 16:9. Our Smart Ratio Simplifier above does this calculation instantly for any resolution you enter.

Aspect Ratio in Responsive Web Design

Modern CSS makes it simple to lock elements to a specific aspect ratio using the aspect-ratio property. This ensures videos, images, and UI containers maintain their proportions at all screen widths. Previously developers used the "padding-top percentage hack," but the CSS aspect-ratio property (supported since 2021 in all major browsers) is the clean, modern approach.

Related Tools on FastSaveMedia

Video Cropper — Crop videos to exact aspect ratios for TikTok, Instagram, and YouTube
Social Media Resizer — Resize images to exact platform dimensions instantly
Safe Zone Checker — Preview UI overlaps on TikTok, Reels, and Shorts