Simple.Tools -> Aspect Ratio Calculator
Calculate image, video, and screen aspect ratios from width and height values.
Presets
Custom
16:9 (Widescreen)
4:3 (Standard)
1:1 (Square)
21:9 (Ultrawide)
Swap W & H
Original Dimensions
Width (W1)
Height (H1)
New Dimensions (Leave one blank to calculate)
New Width (W2)
New Height (H2)
Calculate
Copy Output
Reset
Clear
Aspect Ratio Result