Aspect Ratio Calculator
Free ToolCalculate widescreen, mobile, and print aspect ratios with automatic width, height, and dimension scaling.
Instant 0ms
100% Client-Side
Original Dimensions (Ratio Source)
px
px
Proportional Dimension Scaler
px
px
Visual Aspect Ratio Preview
Computed Ratio
Formula:
(Width / Height) reduced via Greatest Common Divisor (GCD)
Instant Real-time
Frequently Asked Questions
The standard widescreen aspect ratio for YouTube, TV, and monitors is 16:9 (such as 1920x1080 or 3840x2160).
Enter the original dimensions, then enter your desired new width or height. The calculator computes the exact matching dimension.