Aspect
Ratio
Calculator

Calculate and simplify aspect ratios from pixel dimensions. Scale to new sizes while preserving proportions. Common presets for video, photo, and social media.

Original Dimensions

×
Aspect Ratio

16:9

Decimal: 1.7778

Scale to New Size

Enter a new width or height to calculate the other dimension while keeping the same ratio.

Preview

16:9

Common Ratios

Learn more

Why is 16:9 the standard, and what happens when your content and container ratios do not match?

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Frequently Asked Questions

1920x1080 has an aspect ratio of 16:9, which is the standard for HD and 4K video, most computer monitors, and YouTube videos.

Enter the original dimensions to find the aspect ratio, then use the

Instagram supports 1:1 (square posts), 4:5 (portrait posts, recommended for maximum feed visibility), 16:9 (landscape), and 9:16 (Stories and Reels). Use the presets in the calculator to quickly switch between these.

Aspect Ratio Calculator - Calculate & Scale Ratios | ToolsCanvas