Understanding Aspect Ratios

An Aspect Ratio is the proportional relationship between the width and the height of an image, video frame, or screen. It is typically represented as two numbers separated by a colon (W:H), such as 16:9 or 4:3.

Using an Aspect Ratio Checker is essential for professionals dealing with digital media dimensions—from web developers to social media managers—to ensure visuals maintain the correct proportions and prevent distortion (stretching or squashing) across various devices.

How to Use the Calculator

This utility simplifies the mathematical process of finding ratios. The algorithm functions by determining the Greatest Common Divisor (GCD) between the input width and height.

For example, if you input a Full HD resolution of 1920 × 1080, the tool identifies that both numbers are divisible by 120 (the GCD). Dividing both dimensions by 120 results in the simplified integer ratio of 16:9.

Common Standard Ratios

This checker helps optimize content for industry-standard ratios, including:

• 16:9 – Standard Widescreen (YouTube, HDTV)
• 1:1 – Square (Instagram, Social Media Avatars)
• 4:3 – Traditional Television (SDTV) & Computer Monitors
• 9:16 – Vertical Video (TikTok, Instagram Reels, YouTube Shorts)
• 3:2 – Classic 35mm Photography & Print
• 21:9 – Cinematic Ultra-Widescreen