Aspect Ratio Calculator
Niche ToolsCalculate aspect ratios
Find Aspect Ratio
Aspect Ratio
16:9
Decimal Ratio
1.7778
Orientation
Landscape
Calculate Dimensions from Ratio
Known dimension:
Calculated dimensions: 1920 x 1080 pixels at 16:9 ratio
About Aspect Ratio Calculator
Calculate width or height from an aspect ratio and one dimension.
Frequently Asked Questions
What is an aspect ratio?
An aspect ratio is the proportional relationship between the width and height of an image or screen. It is expressed as two numbers separated by a colon, such as 16:9 or 4:3. It describes the shape of the display, not the actual size.
How do I calculate aspect ratio from pixel dimensions?
Divide both the width and height by their greatest common divisor (GCD). For example, a 1920x1080 resolution has a GCD of 120, giving 16:9. This tool does that calculation for you automatically.
What are the most common aspect ratios?
16:9 is the standard for HD video and most monitors. 4:3 is the classic TV and presentation format. 1:1 is used for social media posts. 21:9 is ultrawide, and 9:16 is vertical video for mobile.
Is my data safe?
Yes! All processing happens entirely in your browser. Your data is never sent to any server. No data is collected, stored, or transmitted.
Can I use this to resize images while keeping the aspect ratio?
Yes. Enter a known aspect ratio and one dimension (width or height), and the tool will calculate the other dimension for you. This ensures your resized image maintains the correct proportions.
Ad
728 × 90