Aspect Ratio Calculator
Free online aspect ratio calculator. Instantly calculate and convert aspect ratios for images, videos, and UI. Maintain proportional scaling with visual preview. Perfect for designers, photographers, and developers.
Aspect Ratio Preview
About Aspect Ratio Calculator
Our free Aspect Ratio Calculator is an essential utility for designers, video editors, and content creators. It allows you to easily calculate dimensions (width and height) while maintaining a specific aspect ratio. Whether you are resizing images for the web, cropping videos for social media, or designing responsive layouts, precise calculations are key to avoiding distortion.
Why is Aspect Ratio Important? displaying content on different devices requires adhering to specific standards. For instance, YouTube prefers 16:9, while TikTok and Instagram Stories use 9:16. Using the wrong ratio can result in black bars (letterboxing) or important content being cropped out. This tool ensures your creative work fits perfectly on every screen.
- Instant pixel dimension calculation based on original ratio.
- Comprehensive preset list for popular devices and social platforms.
- Real-time visual preview to check the shape of your output.
- Support for custom ratios and high-resolution 4K/8K calculations.
Simply enter your original dimensions to establish the ratio, then input your desired width or height. The calculator will automatically determine the missing value using the aspect ratio formula, saving you time and ensuring mathematical accuracy.
How to Use
Using the aspect ratio calculator is simple:
- Enter your Original Width and Height to establish the ratio.
- (Optional) Use the "Quick Select" buttons for common presets (e.g., 1080p, 4K, Instagram).
- Enter your desired Target Width OR Target Height.
- The tool will automatically calculate the missing dimension to match the original ratio.
- Use the preview box to visualize the shape of your new dimensions.
Frequently Asked Questions
What is an Aspect Ratio?
An aspect ratio is the proportional relationship between the width and height of an image or screen. It is typically expressed as two numbers separated by a colon, such as 16:9 or 4:3. This ratio defines the shape of the image independent of its resolution (total number of pixels).
How do I calculate the new height or width?
The formula to calculate the new height is: (Original Height / Original Width) × New Width. To find the new width, the formula is: (Original Width / Original Height) × New Height. Our calculator performs these math operations instantly for you.
Common Aspect Ratios Explained
- 16:9 (Widescreen): The standard for HDTV, YouTube videos, and most modern monitors.
- 9:16 (Vertical): The standard for mobile phones, Instagram Reels, TikTok, and YouTube Shorts.
- 4:3 (Traditional): Common in older televisions, CRT monitors, and iPad displays.
- 1:1 (Square): Commonly used for social media profile pictures and Instagram posts.
- 21:9 (Cinematic): Used for ultra-widescreen monitors and major motion pictures.
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