Aspect Ratio Calculator
Calculate and simplify aspect ratios for images and video.
Calculate Aspect Ratio
Calculate Dimension from Ratio
How to Do It Manually
An aspect ratio expresses the proportional relationship between width and height. Simplify by dividing both by their GCD.
Aspect Ratio = Width : Height (simplified by GCD)
- Find the GCD of the width and height.
- Divide both width and height by the GCD.
- Write the result as W:H.
Frequently Asked Questions
What is a 16:9 aspect ratio?
16:9 is the standard widescreen ratio used in most modern TVs and monitors. It means for every 16 units of width there are 9 units of height.
How do I scale dimensions while maintaining aspect ratio?
Multiply both width and height by the same scale factor. Example: 1920×1080 scaled by 0.5 = 960×540.