Aspect Ratio Calculator
Aspect ratio is width:height reduced to small integers (16:9, 4:3, 1:1). Enter two sides to simplify, or enter ratio plus one side to get the other.
Ratio16:9
Decimal1.77778
Formula
Divide width and height by gcd(width, height).
How to use this calculator
- Enter pixel width and height.
- Read the simplified ratio.
Examples
1920×1080
16:9.
FAQ
Ultrawide 3440×1440?+
Simplifies to 43:18, often marketed as 21:9.