Free toolCalculators
Aspect Ratio Calculator
Calculate matching dimensions and identify any aspect ratio.
Your workspace
Ready when you are
Quick answer: Aspect ratio is width divided by height, reduced to its simplest form - 1920x1080 is 16:9. To resize without distortion, multiply both dimensions by the same factor; the calculator below fills in the matching dimension automatically.
A little context
Make the next step easier
Keep proportions intact when resizing: enter your original dimensions and any one new dimension, and the calculator fills in the other. It also simplifies any width × height into its cleanest ratio (like 16:9 or 4:3).
Simple workflow
How it works
Enter the original width and height.
Enter either the new width or the new height.
Read the matching dimension and the simplified ratio.
Questions, answered
Frequently asked questions
Why does aspect ratio matter for logos and patches?+
Stretching a design to fit a space distorts text and shapes instantly — viewers notice even 5% distortion. Scale proportionally and crop or pad instead, or have the artwork properly recomposed for the new shape.