Aspect Ratio Resize Calculator
Enter one new dimension and instantly get the matching width or height that keeps your original aspect ratio.
Calculation Result
About this tool
Resizing an image or video without distorting it means keeping the original width-to-height ratio intact. This calculator does the math for you: enter your original dimensions, then type either a new width or a new height, and it instantly fills in the matching value that keeps the proportions correct.
It's a quick way to check crop or export sizes before resizing in Photoshop, Figma, a CMS, or a video editor, without pulling out a calculator or doing the cross-multiplication yourself.
Common uses
Resizing photos for a website while keeping them sharp and undistorted, fitting a banner into a fixed width, or scaling a video export down for faster uploads — all while preserving the original proportions exactly.