What is an Aspect Ratio?

An aspect ratio describes the proportional relationship between its width and its height. It is commonly expressed as two numbers separated by a colon, such as 16:9.

How do I use this calculator?

Enter your original dimensions (W1 and H1) to define the ratio, then enter either the new width or height to find the corresponding dimension while locked.

Can I use custom ratios?

Yes! Simply enter any width and height values, and the tool will detect the ratio and allow you to scale based on those exact proportions.

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Aspect Ratio Calculator

New

Easily calculate and scale dimensions for images, videos, and screens while maintaining perfectly locked aspect ratios.

Base Resolution (Source)

Width (W1)

Height (H1)

Calculated Aspect Ratio:16:9

Target Dimensions (Scaled)

New Width (W2)

New Height (H2)

Common Ratios

Verified Tool QualityLive & Secure

This tool has been extensively tested for accuracy and performance. On April 2026, our engineers verified the core logic to ensure 100% reliability and precision. Like all CosmoxHub utilities, this tool runs entirely in your browser. No data is ever sent to a server.

No Uploads

No Logs

HIPAA & GDPR Ready

Open Source Logic

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