Aspect Ratio Calculator
Easily calculate, convert, or simplify any aspect ratio. Enter your ratios or pixel dimensions to get the exact proportion for any resolution. Ideal for video creators, photographers, designers, and developers.
Want to explore all common video, photo, and cinema aspect ratios? Check the Aspect Ratio Chart .
⭐ What Is an Aspect Ratio?
The aspect ratio describes the proportional relationship between the width and height of an image, video, or screen.
It’s usually written as two numbers separated by a colon, for example:
- 16 : 9
- 4 : 3
- 21 : 9
An aspect ratio does not represent a specific size; it represents a shape.
Any resolution that matches the same width-to-height proportion uses the same aspect ratio. For example, 1920 × 1080 and 1280 × 720 are both 16 : 9.
⭐ How to Use This Aspect Ratio Calculator
You can use this tool in two main ways:
1. Enter a Width Ratio and Height Ratio
For example:
- Width ratio: 16
- Height ratio: 9
The calculator will simplify your input and display the normalized aspect ratio.
2. Enter a Width and Height in Pixels
For example:
- Width: 1920px
- Height: 1080px
The calculator will detect the underlying ratio and show you the closest matching aspect ratio (with optional rounding).
This is especially useful for UI designers, filmmakers, photographers, and developers who want to confirm the correct ratio for their layouts, videos, or images.