Free Developer Tool
Visual Aspect Ratio Calculator
Calculate proportional dimensions for images, videos, and UI design. Instantly convert 16:9, 4:3, and custom screen resolutions with live visual previews.
Ratio
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Scale
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Output
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Original Size
This is your base ratio.
Set base size
Source width
Source height
Target Size
Fill one value and the other updates.
Edit width or height
Height auto-calculates
Width auto-calculates
Quick Ratios
Aspect Ratio
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Scale Change
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Target Size
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How to Calculate Aspect Ratio
The aspect ratio of an image describes the proportional relationship between its width and its height. Our calculator uses the standard mathematical formula: (Original Height / Original Width) × New Width = New Height.
Common Aspect Ratios in 2024
- 16:9 (Widescreen): The standard for YouTube videos, 4K/1080p monitors, and modern TVs.
- 9:16 (Vertical): Essential for mobile-first content like Instagram Reels, TikTok, and YouTube Shorts.
- 1:1 (Square): The classic Instagram post format, also used for profile pictures.
- 4:3 (Standard): Used in older monitors, iPads, and micro-four-thirds photography.