Aspect Ratio Calculator
Calculate aspect ratios and missing dimensions instantly.
Aspect Ratio Calculator
Resolution to ratio
16:9
1.778:1 · Landscape
Total pixels
2,073,600
Megapixels
2.07
Standard
Full HD
Values must be greater than 0.
Example: 1920 × 1080 gives 16:9.
Ratio to dimensions
Target ratio
Custom ratio
Calculated height
1080 px
1920 × 1080 · Widescreen
Visual comparison
Select ratios to compare their shapes.
Guide
How to use
01
Enter dimensions
Enter the width and height of your image, video, screen, or container.
02
Check the ratio
The calculator simplifies the dimensions to the lowest whole-number ratio and shows the decimal value.
03
Calculate a missing dimension
Choose a target ratio, enter either width or height, and the calculator determines the other dimension.
04
Compare ratios
Use the visual comparison to see how common aspect ratios differ in shape.
About
About aspect ratio
Aspect ratio describes the proportional relationship between width and height. For example, 1920×1080 simplifies to 16:9.
What is Aspect Ratio?
Aspect ratio is written as width:height and describes the shape of an image, video, display, or layout. Different dimensions can have the same aspect ratio.
FAQ
Aspect Ratio FAQ
01What is aspect ratio?
Aspect ratio describes the proportional relationship between an image or screen's width and height.
02How do I calculate aspect ratio from width and height?
Divide the width and height by their greatest common divisor to reduce them to the simplest whole-number ratio.
03What aspect ratio is 1920×1080?
1920×1080 simplifies to 16:9.
04How do I calculate the height of a 16:9 screen?
Divide the width by 16 and multiply the result by 9.
05What is the difference between 16:9 and 21:9?
16:9 is a common widescreen shape. 21:9 is commonly used to describe a wider ultrawide shape.
06Can I calculate a custom aspect ratio?
Yes. Enter your own width and height or use a custom ratio to calculate the missing dimension.
07Will changing aspect ratio stretch an image?
If the original proportions are not preserved, changing the aspect ratio can stretch or distort the image.