Aspect Ratio Calculator
Calculate dimensions while maintaining aspect ratio. Common presets included.
Original Dimensions
x
Ratio: 16:9
Resize (keep ratio)
x
Enter either width or height — the other is calculated automatically.
16:9
About Aspect Ratios
An aspect ratio is the proportional relationship between width and height. Common examples: 16:9 for widescreen video, 4:3 for traditional displays, 1:1 for square images, and 9:16 for mobile-first vertical content like Instagram Stories.