Compare two screens with different aspect ratios
A wider aspect ratio can change the visible width a lot even if the diagonal stays similar.
Everyday Tools
Screen Size Calculator
Estimate screen width, height, and area from a diagonal size and aspect ratio.
Why this page exists
Screen comparisons are easier when diagonal size is translated into actual width and height instead of left as one marketing number. This calculator helps visitors estimate visible screen width, height, and area from a diagonal size and aspect ratio.
Interactive tool
Run the estimate
Enter your numbers and read the result first, then use the sections below to understand what affects the outcome.
Calculator
Screen size calculator
Estimate screen width, height, and area from diagonal size and aspect ratio.
Result
23.5 in x 13.2 in
Estimated screen width, height, and area based on the diagonal size and aspect ratio entered.
Screen width23.5 inches
Screen height13.2 inches
Screen area311.5 sq in
Aspect ratio16:9
- 27.0 inches on a 16:9 aspect ratio works out to about 23.5 inches wide by 13.2 inches tall.
- That gives an active screen area of roughly 311.5 square inches.
- This is most useful for comparing visible display size across screens that share or differ in aspect ratio before you buy.
This is a display-size planning estimate. Bezels, rounded corners, and device shape can all make the physical product different from the active screen area.
Planning note
Last updated April 11, 2026. Use this tool to compare scenarios and plan ahead, then confirm important details with the lender, employer, insurer, contractor, or other qualified provider involved in the final decision.
How it works
What the calculator is doing
Enter the screen diagonal in inches and the aspect ratio values.
The calculator uses the aspect-ratio triangle to estimate the screen width and height.
It also multiplies width by height to show approximate screen area for quick side-by-side comparisons.
Understanding your result
Diagonal size alone can hide meaningful differences between screens with different aspect ratios. Width, height, and area make the physical display shape easier to compare before buying or setting up a workspace.
Browse more everyday toolsExamples
Ways people use this tool
Example scenarios help turn a quick estimate into a more useful comparison or planning step.
Estimate desk-fit dimensions
Seeing width and height can be more practical than diagonal size alone when planning around a workspace.
Translate a diagonal measurement into area
Area gives a more complete feel for how much screen surface you are actually getting.
FAQ
Common questions
How does this screen size calculator work?
It combines the diagonal measurement with the aspect ratio to estimate the active screen width and height using basic geometry.
Why is diagonal size not enough by itself?
Because screens with different aspect ratios can have very different widths and heights even when the diagonal number looks similar.
Does this include bezels or device frame size?
No. It estimates the screen area itself, not the outer dimensions of the full device.
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