Aspect Ratio Calculator for Images and Video
Enter a width and height to get the ratio, such as 16:9, then work out new sizes that keep the same proportions. For photos, video and design.
New size, same ratio
- Free, no sign-up
- Files are not uploaded
- Works on any device
How to use
- Enter the original width and height, or tap a preset ratio
- Read the ratio
- Enter a new width or height and the other value is calculated for you
Things to know
Results are rounded to whole numbers. For an exact ratio, choose sizes that divide evenly. This tool does not resize image files. To cut an image to a ratio, use the Crop tool.
FAQ
What is 16:9?
A width to height ratio of 16 to 9, the standard for most TVs and video, for example 1920×1080.
How is a ratio simplified?
Divide the width and height by their greatest common divisor. 1920×1080 divided by 120 gives 16:9. The tool does this automatically.
Does it work on my phone?
Yes. It runs in the browser on iPhone and Android, with no app to install.
Where do my files go? Are they stored?
Nowhere. Files are processed only in your browser, are never uploaded to a server, and are gone when you close the page.