Aspect Ratio Calculator

PRO · DARK

Precision dimension scaler, visual framing engine & code generator

Resolution Dimension Scaler

Width (pixels)

Height (pixels)

Quick Ratios

16:9HD/4K

9:16Shorts/Reels

4:3Classic/TV

1:1Square Post

4:5IG Portrait

21:9Ultrawide

3:235mm DSLR

2.39:1Cinema

Target Dimension Solver Locks exact current ratio

If Target Width is:

Calculated Height 720 px

If Target Height is:

Calculated Width 1280 px

Proportional Visual Stage

16:9 1920 × 1080

W: 1920px H: 1080px

Total Pixels

2,073,600

Megapixels

2.07 MP

Diagonal Px

2,203 px

GCD Divisor

120

💡 Mathematically verified with Euclidean GCD reduction. 100% private in-browser computation.

Standard Industry Presets

Click any card to apply dimensions directly into the calculator.

4K Ultra HD16:9

3840 × 2160 px

YouTube 2160p, UHD TVs, high-res editing

1080p Full HD16:9

1920 × 1080 px

Standard broadcast, desktop monitors, web video

TikTok & Reels9:16

1080 × 1920 px

Vertical video for mobile feeds & YouTube Shorts

Instagram Portrait4:5

1080 × 1350 px

Maximum vertical timeline space without crop

Square Post1:1

1080 × 1080 px

Profile avatars, classic Instagram square feed

Ultrawide 1440p21:9

3440 × 1440 px

Panoramic curved monitors & gaming displays

CinemaScope2.39:1

3840 × 1607 px

Anamorphic cinematic theatrical feature films

35mm Sensor3:2

6000 × 4000 px

24MP full-frame DSLR and mirrorless cameras

Batch Resolution Multipliers

Pre-computed asset scales maintaining current aspect ratio.

Scale Factor	Dimensions (W × H)	Megapixels	Target Output	Action

Developer & Designer Code Snippets

Production-ready CSS and markup for web responsive layouts.

Modern CSS Property

aspect-ratio: 16 / 9;

Tailwind CSS Class

aspect-video

React / JSX Style Prop

style={{ aspectRatio: '16 / 9' }}

SVG viewBox Attribute

viewBox="0 0 1920 1080"

Aspect Ratio Guide & Frequently Asked Questions

Helpful explanations of aspect ratios, resolution scaling, and responsive design.

What does this aspect ratio calculator do?▼

It takes any width and height, simplifies them down to their lowest integer ratio (like 16:9 or 4:3) using the greatest common divisor (GCD), and lets you scale either side while preserving proportions without stretching or squishing visuals.

What is the difference between aspect ratio and resolution?▼

Resolution is the exact count of pixels on a display (e.g. 1920×1080 = 2,073,600 pixels). Aspect ratio describes the proportional relationship between the width and height regardless of physical size (16 units wide for every 9 units tall).

How do I preserve aspect ratio in web design?▼

In modern CSS, you can apply aspect-ratio: 16 / 9; directly to container elements or images. In Tailwind CSS, utilities like aspect-video and aspect-square enforce responsive ratios across devices.

Does this tool transmit or store my data?▼

No. All calculations run client-side in your web browser. Nothing is sent to an external server, guaranteeing 100% privacy and zero latency.