Aspect Ratio Calculator
Calculate and resize dimensions while maintaining aspect ratio.
Original Dimensions
Resize Calculator
What is Aspect Ratio Calculator?
An aspect ratio calculator helps you maintain proportional dimensions when resizing images, videos, or any rectangular content. It calculates the relationship between width and height (like 16:9 or 4:3) and automatically adjusts dimensions to preserve this ratio, preventing stretching or distortion.
How to Use This Tool
- Enter your original width and height in pixels
- The tool will automatically calculate and display the aspect ratio
- Use the resize calculator to enter a new width or height
- The other dimension will automatically adjust to maintain the ratio
- Use quick presets for common aspect ratios like 16:9 or 4:3
Common Use Cases
- Resizing images for social media while preserving proportions
- Calculating video dimensions for different platforms
- Designing responsive layouts that maintain aspect ratios
- Preparing images for print at different sizes
Frequently Asked Questions
What is the most common aspect ratio for videos?
16:9 is the most common aspect ratio for HD and 4K videos, used by YouTube, Netflix, and most modern displays. It's also known as widescreen format.
How do I calculate aspect ratio manually?
Divide both width and height by their greatest common divisor (GCD). For example, 1920×1080 divided by 120 gives 16:9. Our tool does this automatically.
What aspect ratio should I use for social media?
It varies by platform: Instagram feed posts use 1:1, Stories use 9:16, YouTube uses 16:9, and Twitter supports a wide range but 16:9 works well.