Design calculator
Aspect Ratio Calculator
Reduce image, video, and screen dimensions to an aspect ratio.
Enter positive pixel or physical dimensions.
Aspect ratio
—
How it works
Integer dimensions are simplified exactly with the greatest common divisor. Decimal dimensions are reported relative to 1.
Aspect ratio = width ÷ height
Worked example
1920 by 1080 simplifies to 16:9 and has a decimal ratio of about 1.7778.
How to use this tool
- Enter the known values and choose units where available.
- Check the primary result and supporting details.
- Clear or replace an input to calculate another case.
Frequently asked questions
What happens with invalid or incomplete inputs?
The result remains blank until the required inputs form a finite, meaningful calculation. Zero denominators and physically impossible negative quantities are not calculated.
Can I use decimal values?
Yes. The tool accepts decimals and keeps full precision for the calculation while rounding the displayed result for readability.