About the Aspect Ratio Calculator
Aspect ratio is the proportional relationship between an image's width and height. Keeping it the same when resizing prevents stretching.
Type in a width and height to see the simplified ratio, then enter a new width or height to get the matching dimension.
How to use it
- 1Enter your original width and height.
- 2Read the simplified ratio and decimal value.
- 3Enter a new width or height to calculate the other side.
Why use this tool
Instant results
Updates as you type.
Two-way scaling
Solve for new width or new height.
Common presets
One click for 16:9, 4:3, 1:1, 9:16 and more.
No upload needed
Pure calculation in the browser.