Aspect Ratio Calculator

Instantly calculate screen resolutions and aspect ratios for video editing, web design, and photography.

Enter width and height...

What is an Aspect Ratio?

An aspect ratio is the proportional relationship between the width and height of an image, screen, or video frame. It is written as two numbers separated by a colon (e.g., 16:9). Understanding aspect ratios is critical for video editors, web developers, and graphic designers to ensure media displays correctly without stretching or black bars.

How to Use This Calculator

  1. Find the Ratio: Enter your known width and height (e.g., 1920x1080) to find the simplified ratio (16:9).
  2. Find the Dimensions: Enter your desired ratio (e.g., 16:9) and a target width to instantly calculate the exact height needed.

Frequently Asked Questions

What is the most common aspect ratio for YouTube?

The standard aspect ratio for YouTube videos is 16:9. Common resolutions include 1920x1080 (1080p) and 3840x2160 (4K).

What is the aspect ratio of a standard TV?

Modern HDTVs and monitors use a 16:9 aspect ratio, while older CRT televisions typically used a 4:3 aspect ratio.

What is the best aspect ratio for Instagram Reels and TikTok?

Short-form vertical video platforms use a 9:16 aspect ratio. The recommended resolution is 1080x1920 pixels.

How do I calculate a 16:9 ratio manually?

To calculate the height for a 16:9 ratio, multiply your width by 9, then divide by 16. (Height = Width * 9 / 16).