Resolution & Aspect Ratio Calculator
Detect the aspect ratio and calculate an equivalent resolution while keeping the width.
What this tool does
Calculate proportional dimensions when changing a resolution or compare aspect ratios such as 16:9 and 4:3. The calculator preserves geometry mathematically; it cannot guarantee how a particular game or app will scale, crop or add black bars.
How to use it
Enter the values requested by the calculator and check the result together with the notes shown below it.
Practical example
Use a realistic example from your own setup to compare scenarios. The result is a reference, not a replacement for manufacturer specifications.
How to interpret the result
Treat the result as an estimate whenever real-world factors are not available to the browser. For hardware, network or safety decisions, verify the relevant technical specifications.
Frequently asked questions
How is the aspect ratio calculated?
Width and height are divided by their greatest common divisor; 1920×1080 reduces to 16:9.
What is the target aspect for?
To get an equivalent resolution that keeps the desired proportion, for example when scaling an image or configuring a game.