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Aspect Ratio Calculator

Enter dimensions to calculate ratio and check platform compatibility.

Width (px)

Height (px)

Aspect Ratio

16:9

1.777

YouTube Standard

Common Standards

HD / YouTube

1920 x 1080

16:9

TikTok / Reels

1080 x 1920

9:16

Insta Square

1080 x 1080

1:1

Insta Portrait

1080 x 1350

4:5

Cinema Scope

2048 x 858

~2.39:1

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About This Tool

This Aspect Ratio Calculator is a utility for filmmakers, UI designers, and photographers. Calculating the correct aspect ratio is crucial when exporting content for different platforms (like Instagram, TikTok, or Cinema screens) to ensure no critical content is cropped out.

The visualizer below the calculator updates in real-time to give you a geometric sense of the frame shape.

How it Works

We use the Greatest Common Divisor (GCD) algorithm to simplify the resolution down to its smallest integer ratio. For cinematic formats that don't fit clean integers, we provide the decimal standard (e.g., 2.39:1).

Privacy & Terms

Local Processing

All calculations are performed locally in your browser. We do not transmit your input data to any server, meaning your workflow remains private.

Cookies & Ads

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Disclaimer

While we aim for mathematical precision, platform standards change frequently. Always double-check specific platform requirements before final export.