Monitor Aspect Ratio Calculator

Calculate a monitor’s aspect ratio and pixel count from its resolution.

How the monitor aspect ratio calculator works

Aspect ratio = width ÷ height, reduced to the simplest whole-number ratio. Pixel count = width × height; the diagonal is calculated in pixels using Pythagoras’ theorem.

Example and useful facts

Example: Calculate a monitor’s aspect ratio and pixel count from its resolution. Enter the sample values above, then change one input at a time to see how the result changes.

Formula and assumptions: Aspect ratio = width ÷ height, reduced to the simplest whole-number ratio. Pixel count = width × height; the diagonal is calculated in pixels using Pythagoras’ theorem.

Did you know? A 1920 × 1080 display has a 16:9 aspect ratio, a common format for monitors and video.

Frequently asked questions

What does the monitor aspect ratio calculator calculate?

Calculate a monitor’s aspect ratio and pixel count from its resolution.

Are the results exact?

The result follows the formula and assumptions shown on this page. Real-world rules, measurements, rates, and individual circumstances can affect the final answer.

Results are estimates for general information only. They are not a substitute for professional advice where applicable. Found a mistake? Report an error.