Aspect Ratio Calculator
Calculate aspect ratios and resize dimensions proportionally.
How to Use Aspect Ratio Calculator
Enter width and height or pick a preset
See the simplified aspect ratio
Enter a new width or height to resize proportionally
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About Aspect Ratios
Aspect ratio describes the proportional relationship between width and height of an image or screen. Understanding ratios is essential for video editing, responsive design, and ensuring media displays correctly across different devices.
Common Aspect Ratios
- 16:9: Standard for HD monitors, TVs, and YouTube
- 4:3: Classic TV and iPad displays
- 1:1: Instagram posts and profile pictures
- 9:16: Mobile stories and vertical video
Frequently Asked Questions
What is aspect ratio?
Aspect ratio is the proportional relationship between width and height — for example, 16:9 means 16 units wide for every 9 units tall.
What is the most common aspect ratio?
16:9 is the standard for monitors, TVs, and YouTube. Other common ratios include 4:3 (iPad), 1:1 (Instagram), and 9:16 (mobile stories).