What is Aspect Ratio?
Aspect ratio is the proportional relationship between the width and height of an image or screen. It describes how wide an image is compared to how tall it is.
What are common aspect ratios?
16:9 is standard for HD video and most modern screens. 4:3 was common for older TVs. 1:1 is used for Instagram posts. 9:16 is for mobile stories/TikToks.
How do I resize an image without distortion?
To resize without distortion, you must maintain the original aspect ratio. Use the "Lock Ratio" feature in this calculator to find the correct new dimensions.
How do I calculate aspect ratio manually?
Divide the width by the height. This tool simplifies finding the missing dimension without doing the math yourself.
Can I use this for print?
Yes, aspect ratios apply to paper sizes too (e.g., A4 is roughly 1:1.414).
Does this resize my image?
No, it only calculates the dimensions. To actually resize an image, please use our Image Editor tool.
What is the formula for Aspect Ratio?
The formula is Width / Height. It is often simplified to the lowest common integers (e.g., 1920/1080 = 16/9).
How does this tool help UI designers?
Designers use it to ensure images and containers scale correctly across different screen sizes and devices.
Is this calculator free?
Yes, this Aspect Ratio Calculator is 100% free and runs entirely in your browser.
Do I need to install anything?
No, it is a web-based tool. You can access it from any device with a browser.