Aspect Ratio Calculator
Enter dimensions to calculate ratio and check platform compatibility.
Common Standards
What is an "Aspect Ratio" & why does my photo look stretched?
It is the proportional relationship between an image's width and height (e.g., 16:9). It does not define the actual size (pixels), just the shape. Stretching occurs when an image is forced into a ratio that doesn't match its original dimensions. Our checker helps you identify if cropping is necessary instead.
About This Tool
This Aspect Ratio Calculator is a utility for filmmakers, UI designers, and photographers. Calculating the correct aspect ratio is crucial when exporting content for different platforms (like Instagram, TikTok, or Cinema screens) to ensure no critical content is cropped out. The visualizer below the calculator updates in real-time to give you a geometric sense of the frame shape.
How it Works
We use the Greatest Common Divisor (GCD) algorithm to simplify the resolution down to its smallest integer ratio. For cinematic formats that don't fit clean integers, we provide the decimal standard (e.g., 2.39:1).